Develop Bugs

[Q] Where to get GNex's motherboard? Or in my case, do I need one? Details inside...

Hello Nexans,
Long story short:
I was applying SGP's flex to my phone yesterday. Too much water maybe, my phone started acting weird after installation, really dimmed display, touch screen not registering touch, and etc.
So I opened up the phone per ifixit's instruction, attempting to see if there's really any water in there so I can dry the components up.
At the time of opening it up, didn't notice any water at all, while the screen still remains not responding. At the end, the phone finally failed to boot (white Google screen looping). So I put everything back on, and finally leave it looping on my desk while I went out trying to have some fun in order to blow away this Saturday night sadness.
Magically, when I returned home after ~5 hrs, the phone is in the system and the touch screen works perfectly again. Also, the screen is showing images normally again. I happily went to bed with my phone.
This [sad] morning, volume button won't work. Opened it up, found that the volume switch (which was soldered onto the mobo) was ripped off (probably by careless me). Refer to this pic here. EDIT: sorry I still can't post outside link.
Here's the image: guide-images.ifixit.net/igi/2k6S4vvKPZh2IsB2.huge
Now I'm left alone: the phone is a imported GSM, seemingly not supported by anyone in the U.S. right now. Moreover, since the volume switch is soldered onto the mobo, and I am very sure I will ruin the phone if I try to re-solder the switch onto the mobo (it's some finest soldering on there), not to mention that the Cable Ribbon of the volume switch seems to be ruined as well, I think my only option is to get a totally new mobo that has volume switch soldered onto it.
To summarize:
1.Do I need a new mobo, if I find no one to help me repair the phone?
2.Where can I get a new mobo? (searched on eBay w/o results)
3.Will changing the mobo affect anything? I assume the data and system would be lost, but how about the identity of my phone?
4.If there's one agent in the U.S. that you think would take care of this uncostly (~$100?), who would you refer? Maybe Verizon, Samsung, or someone else?
5.If all of the above attempts fail at the end, I'll be considering selling it at a deep discount to someone who's got his way of restoring this phone, where would you recommend for me to go find such a talented Nexus lover? Will eBay fulfill this purpose the best?
Finally, thanks for you, the fellow members, for your help in advance. I hate myself for opening up the phone, now, thinking that the phone may have recovered for good w/o being opened up by me. Now that it has recovered with a broken volume switch in its body, making this issue much more complicated
Again, thanks...

shoulda turned off the phone right after it started acting funky and put it in a bag a rice

it sounds like you jumped the gun and opened the phone prematurely. How long did you wait to open up the phone after you installed the screen guard?
As far as your situation, I would probably cut my losses, get what I can out of it on eBay and buy another one.
Sent from my GSM Galaxy Nexus using Tapatalk

mush03 said:
shoulda turned off the phone right after it started acting funky and put it in a bag a rice
Click to expand...
Click to collapse
Should have I also shouldve stayed with a dry apply film. Being a perfectionist, I almost knew I would ruin the phone by over spraying the application solution for a easier and better application
Ulver said:
it sounds like you jumped the gun and opened the phone prematurely. How long did you wait to open up the phone after you installed the screen guard?
As far as your situation, I would probably cut my losses, get what I can out of it on eBay and buy another one.
Sent from my GSM Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
Actually, immediately. I didn't know the gaps around the glass screen is also the entrance for the water to get into the phone. I thought only headset speaker could let some water into it. After disassembled the phone, I realized that the water can easily get into the phone thru the gap, which leads the water right onto the mobo underneath the glass... Again, I didn't notice any water inside the phone, but i could be just moisture that's playing some nasty game here. I also did some intensive swing and tossing of the phone to get water out, until there's no water coming out.
Anyhow, I just went to Verizon store, and they said they wouldn't touch anything GSM, and said the only option for me seems to contact Samsung. Or as you said, I could sell it on eBay. Don't know how much it's worth though

I had to open up my Gnex last week because i dropped it in a puddle of water while getting out of my car...
If i remember correctly, the vol rocker is glued to the internal part that comes out with the screen and most of the electronics, so i cant imagine how you would have torn it off...
Its connectected to the main pcb via a connector though, sure you didn't just unplug the connector??
You could also try to go without the volume rocker, use some kind of widget for volume control, not ideal but cheaper than a new Gnex

Ooo, I'm sorry for both of us...
Yes, the volume switch is double-side taped, but the other end (the cable ribbon itself) is soldered onto the back of the mobo in my phone. I don't know how or what force ripped it off of the mobo. The cable ribbon is torn pretty harshly... I'll upload a pic when I make past the 10 posts and "unlock all capabilities"..

Also, did you notice any "sequela" after the incident? Does your phone function good now? There's time that on my phone the touch screen does not respond/register touch anymore suddenly. I usually just leave it standby with screen off. Usually, after 1+ hr, when I turn the screen back on, the touchscreen works fine...
Driving me crazy, this bad luck.

Guys,
Here's another issue... How do I get into fastboot mode if my volume rockers don't work..?
Tried Toolkit V4.1 and it keeps saying waiting for device..

cswithxda said:
Guys,
Here's another issue... How do I get into fastboot mode if my volume rockers don't work..?
Tried Toolkit V4.1 and it keeps saying waiting for device..
Click to expand...
Click to collapse
Install the app called quickboot, it lets u go direcrly into recovery or bootloader without holding volume keys.

Thank you sir, I'll give it a try!
OOPS.. I'm not rooted...so it's a no-go

Hey cswithxda, have you found a way to fix it without replacing the mobo?
I live in Brazil, a friend of mine brought one bought at Negri electronics at US for me. It suffered an accident (part of it involves someone pushing down a window over it) and the screen cracked.
I've sent it back to Negri for RMA Repair to fix the screen and they did it, but before shipping back, found that the volume buttons weren't working. They canceled the shipment and found out that the volume cable was broken (the screen crack was near to the volume buttons, so I guess it wasn't them that broke it while fixing the screen).
Well, I've actually paid for the screen repair and ship back, but they claim that their repair facility was unable to fix the volume... any light over this?

cswithxda said:
Guys,
Here's another issue... How do I get into fastboot mode if my volume rockers don't work..?
Tried Toolkit V4.1 and it keeps saying waiting for device..
Click to expand...
Click to collapse
If you have all the drivers type 'fastboot reboot bootloader' in the command prompt
Sent from my Galaxy Nexus using xda premium

tinsukE said:
Hey cswithxda, have you found a way to fix it without replacing the mobo?
I live in Brazil, a friend of mine brought one bought at Negri electronics at US for me. It suffered an accident (part of it involves someone pushing down a window over it) and the screen cracked.
I've sent it back to Negri for RMA Repair to fix the screen and they did it, but before shipping back, found that the volume buttons weren't working. They canceled the shipment and found out that the volume cable was broken (the screen crack was near to the volume buttons, so I guess it wasn't them that broke it while fixing the screen).
Well, I've actually paid for the screen repair and ship back, but they claim that their repair facility was unable to fix the volume... any light over this?
Click to expand...
Click to collapse
Sorry I can't help buddy, at the time I owned the device, it was still pretty new, so I couldn't find a source that actually sells GNex motherboard. I think the only way to fix a ripped rocker button is to replace mobo if you don't find anywhere to solder it for you.
Important part is this, for whoever got the chance, buy it from Amazon! The rep was kind enough to issue me an RMA after knowing my ripped volume rocker is my own fault, and while I was actually trying to ask him about where to send it to fix. They just gave me an RMA and let me send it back and get anything else I want. Amazon customer service another miracle!
nbeebe24 said:
If you have all the drivers type 'fastboot reboot bootloader' in the command prompt
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Thanks for the help! altho i returned the device

[Q] Problems with power button and no way to fix it, workarounds?

It seems that my power button has died on my Galaxy Nexus, which is a huge pain in the strategical locations. While I know how to turn the phone off should it shut down, I have no idea how to handle anything else. I have my friends CALL ME to be able to unlock the phone and use it.
There are some apps on Android Market that specifically state that they fix power buttons, but none of them work with the latest versions of Android according to the reviews (if there's any I've missed, let me know).
I know that the phone can be turned off using a charger, since plugging it in or out makes the screen turn on. But are there other ways to turn on the screen, since it's a phone and I'm mobile most of the time?
Is there another way to remap the keys on Android? Note that I cannot root my phone, so options like that are not good either.
Is there a way to remotely turn on Android phone with a tablet through some app? Since I'm carrying my Nexus 7 with me and it uses my phones internet connection to stay online. I tried to find an app that does this, but could not find any.
Any help is much appreciated! I do not wish to buy Nexus 4 at the moment because it isn't much of an improvement and sending it back to UK for warranty seems like a huge mess that I would rather avoid for now.
Thanks!

kristovaher said:
It seems that my power button has died on my Galaxy Nexus, which is a huge pain in the strategical locations. While I know how to turn the phone off should it shut down, I have no idea how to handle anything else. I have my friends CALL ME to be able to unlock the phone and use it.
There are some apps on Android Market that specifically state that they fix power buttons, but none of them work with the latest versions of Android according to the reviews (if there's any I've missed, let me know).
I know that the phone can be turned off using a charger, since plugging it in or out makes the screen turn on. But are there other ways to turn on the screen, since it's a phone and I'm mobile most of the time?
Is there another way to remap the keys on Android? Note that I cannot root my phone, so options like that are not good either.
Is there a way to remotely turn on Android phone with a tablet through some app? Since I'm carrying my Nexus 7 with me and it uses my phones internet connection to stay online. I tried to find an app that does this, but could not find any.
Any help is much appreciated! I do not wish to buy Nexus 4 at the moment because it isn't much of an improvement and sending it back to UK for warranty seems like a huge mess that I would rather avoid for now.
Thanks!
Click to expand...
Click to collapse
First, try pgm (slide 2 wake).
Secondly, why can't you root the device? Once you have your screen on, you can turn on USB debugging, and use to it reboot to recovery or fastboot.
Third, there's some experience from users that fixed their own device's power button.
Sent from my Nexus

Buy a new power button and put it in.
For Toro & Toroplus:
http://www.etradesupply.com/oem-samsung-galaxy-nexus-sch-i515-power-button-flex-cable-ribbon.html
For everything else:
http://www.parts4repair.com/samsung-galaxy-nexus-i9250-power-flex-cable/

kristovaher said:
It seems that my power button has died on my Galaxy Nexus, which is a huge pain in the strategical locations. While I know how to turn the phone off should it shut down, I have no idea how to handle anything else. I have my friends CALL ME to be able to unlock the phone and use it.
There are some apps on Android Market that specifically state that they fix power buttons, but none of them work with the latest versions of Android according to the reviews (if there's any I've missed, let me know).
I know that the phone can be turned off using a charger, since plugging it in or out makes the screen turn on. But are there other ways to turn on the screen, since it's a phone and I'm mobile most of the time?
Is there another way to remap the keys on Android? Note that I cannot root my phone, so options like that are not good either.
Is there a way to remotely turn on Android phone with a tablet through some app? Since I'm carrying my Nexus 7 with me and it uses my phones internet connection to stay online. I tried to find an app that does this, but could not find any.
Any help is much appreciated! I do not wish to buy Nexus 4 at the moment because it isn't much of an improvement and sending it back to UK for warranty seems like a huge mess that I would rather avoid for now.
Thanks!
Click to expand...
Click to collapse
I had a similar problem with my Samsung Captivate a long time ago. I used WidgetLocker and enabled volume wake function. It uses volume buttons to wake the screen. I'm not sure if this feature is still available, but it's worth a try. If it is not, you can ask for a refund. There are also several apps/widgets to put the phone to sleep. I used this combo for a few months before I got a new phone. Hope this helps :fingers-crossed:

I still haven't found a solution and these apps that say they are a solution, do not work on latest versions of Android. Any other options?

kristovaher said:
I still haven't found a solution and these apps that say they are a solution, do not work on latest versions of Android. Any other options?
Click to expand...
Click to collapse
download intellicover app from play store. does not require root

i think pgm is the solution, but you have to root the phone

I've managed to fix my power button recently, its a hardware problem. Do this only if you dont have warranty and are comfortable with opening up your Nexus.
Go to iFixit website and follow instructions to dissassemble the Nexus, its quite easy, a few screws and flat cable disconnects. Next, you need to remove your power button flex cable from the motherboard, do this by lifting the cable connector on the motherboard up and pulling it gently out.
Next thing is a bit tricky and you need to have pretty good sight and precision.
On the flex cable the button consists of 2 pieces, the flex cable and the button itself, which is like a black sticker sticked on the flex cable.
I've removed the sticker and the button that is glued to it with a scalpel (careful!!) and I've found actually rust and dirt on contacts (dunno how rust got there, i have expected dirt only), and then with my scalpel I've carefully scratched the dirt and rust of both parts of the button and its contacts on the flex cable. After that I've put the black sticker back on the flex as it was before (if it wont glue tape it with a small piece of tape) and return everything where it was and assemble Nexus back togeather. And voila! It works!
Keep in mind that I didn't have warranty so it was either open up and try to repair or toss a $200 device. Also, I'm not responsible for any damage that you do to your phone, this is just a brief description of my power button fix. Hope there will be more successful repairs :fingers-crossed:

I had to use volume_wake, while waiting for replacement power button. But this feature does not present on stock roms.

I believe i've read about remapping the hardware buttons; if you're interested, search google. I personally prefer and use smart screen on. I just wave over the proximity sensor and the screen turns on.

Try procedure described here: http://androidforums.com/samsung-galaxy-nexus/700265-power-button-not-working.html#post5797688.
I was very skeptical, but it indeed worked on my phone. Power button started to act normally again! I was amazed!

Wlld1 said:
I had to use volume_wake, while waiting for replacement power button. But this feature does not present on stock roms.
Click to expand...
Click to collapse
This would be the easiest thing to do if you're already rooted
Sent from my Galaxy Nexus using Tapatalk 2

dj_chapz said:
On the flex cable the button consists of 2 pieces, the flex cable and the button itself, which is like a black sticker sticked on the flex cable.
I've removed the sticker and the button that is glued to it with a scalpel (careful!!) and I've found actually rust and dirt on contacts (dunno how rust got there, i have expected dirt only), and then with my scalpel I've carefully scratched the dirt and rust of both parts of the button and its contacts on the flex cable. After that I've put the black sticker back on the flex as it was before (if it wont glue tape it with a small piece of tape) and return everything where it was and assemble Nexus back togeather. And voila! It works! D
Click to expand...
Click to collapse
Thank you so much for this! Mine just died an hour ago and I have already fixed it in under 20 minutes.

doomed151 said:
Thank you so much for this! Mine just died an hour ago and I have already fixed it in under 20 minutes.
Click to expand...
Click to collapse
Glad to be of help :good:

Solved the same problem with dj_chapz suggestion posted here http://forum.xda-developers.com/showpost.php?p=41282390&postcount=8
After I split in half the button I found oxidized contacts with green and black scurf. Cleaned it with little amount of ethyl - works perfectly!

dj_chapz said:
I've managed to fix my power button recently, its a hardware problem. Do this only if you dont have warranty and are comfortable with opening up your Nexus.
Go to iFixit website and follow instructions to dissassemble the Nexus, its quite easy, a few screws and flat cable disconnects. Next, you need to remove your power button flex cable from the motherboard, do this by lifting the cable connector on the motherboard up and pulling it gently out.
Next thing is a bit tricky and you need to have pretty good sight and precision.
On the flex cable the button consists of 2 pieces, the flex cable and the button itself, which is like a black sticker sticked on the flex cable.
I've removed the sticker and the button that is glued to it with a scalpel (careful!!) and I've found actually rust and dirt on contacts (dunno how rust got there, i have expected dirt only), and then with my scalpel I've carefully scratched the dirt and rust of both parts of the button and its contacts on the flex cable. After that I've put the black sticker back on the flex as it was before (if it wont glue tape it with a small piece of tape) and return everything where it was and assemble Nexus back togeather. And voila! It works!
Keep in mind that I didn't have warranty so it was either open up and try to repair or toss a $200 device. Also, I'm not responsible for any damage that you do to your phone, this is just a brief description of my power button fix. Hope there will be more successful repairs :fingers-crossed:
Click to expand...
Click to collapse
I just did this repair and I have large clumbsy fingers. thank you! I just had to remove corrosion between the button contacts and around. i dabbed nail polish remover (i'm not sure if that is a bad idea or not, but it got my phone working!) and did a little bit of scraping. on my sch-i515 there was a some clear plastic folded over the back sticker part that i had to get up, then i was able to get the black part up without having to fully remove it.

Which replacement screen (Sharp, sony acer)

ok so... the store broke my lcd while they were trying to remove the digitizer... and now i am looking at ebay on which lcd+touch assemlby to buy and i have a question. are the sony, acer and sharp lcd versions compatible with all one x mobos? i did some research and found that the sony version is the best (so they say)

and313 said:
ok so... the store broke my lcd while they were trying to remove the digitizer... and now i am looking at ebay on which lcd+touch assemlby to buy and i have a question. are the sony, acer and sharp lcd versions compatible with all one x mobos? i did some research and found that the sony version is the best (so they say)
Click to expand...
Click to collapse
Hi,
The Sony and Sharp are not compatible with each other( I've tried to replace one with the other), I've never come across the Acer LCD in Australia so I'm not sure. If you don't know how to tell the Sharp and Sony apart, the Sharp has Green backing on the flex cable, while the Sony is sort of orange with a few yellowish stripeson the back of the LCD flex cable. Sorry I couldn't find any of my photos which show the difference. I would recommend buying the LCD/digitizer combo and a separate midframe to mount it on, as it comes with new 3M adhesive, but you may also have to add a few TINY drops of instant adhesive, I say tiny as too much will press out under the digitizer and will show up, but I have found that without it the digitizer will lift from the frame eventually due to the tight fit of the frame in the rear shell of the HOX.
Hope you go ok!
---------- Post added at 06:45 PM ---------- Previous post was at 06:41 PM ----------
Sorry, just a bit of additional info, have also come across posts saying the colours of the LCD look washed out with the wrong LCD.

okhughes said:
Hi,
The Sony and Sharp are not compatible with each other( I've tried to replace one with the other), I've never come across the Acer LCD in Australia so I'm not sure. If you don't know how to tell the Sharp and Sony apart, the Sharp has Green backing on the flex cable, while the Sony is sort of orange with a few yellowish stripeson the back of the LCD flex cable. Sorry I couldn't find any of my photos which show the difference. I would recommend buying the LCD/digitizer combo and a separate midframe to mount it on, as it comes with new 3M adhesive, but you may also have to add a few TINY drops of instant adhesive, I say tiny as too much will press out under the digitizer and will show up, but I have found that without it the digitizer will lift from the frame eventually due to the tight fit of the frame in the rear shell of the HOX.
Hope you go ok!
---------- Post added at 06:45 PM ---------- Previous post was at 06:41 PM ----------
Sorry, just a bit of additional info, have also come across posts saying the colours of the LCD look washed out with the wrong LCD.
Click to expand...
Click to collapse
ok tnx for the info... and i was thinking i can just order whatever. i checked the panel_type in the last_kmsg and i found that i have the replacement screen for which nobody knows who makes it. but it is a warm panel so it probably is sony... but i have to rip it apart to be certain
Sent from my One X using Tapatalk

and313 said:
ok tnx for the info... and i was thinking i can just order whatever. i checked the panel_type in the last_kmsg and i found that i have the replacement screen for which nobody knows who makes it. but it is a warm panel so it probably is sony... but i have to rip it apart to be certain
Sent from my One X using Tapatalk
Click to expand...
Click to collapse
That's the only downside - having to pull phone apart to check which one you have. Also another tip, phone need to be on to change LCD's, boot phone up with it apart, then wake up with power button on old screen, then sleep with power button, change screens then wake up again. There are plenty of vids on youtube to help, if new screen doesn't activate, check flex cable is in square and all the way - have had this problem before also.

okhughes said:
That's the only downside - having to pull phone apart to check which one you have. Also another tip, phone need to be on to change LCD's, boot phone up with it apart, then wake up with power button on old screen, then sleep with power button, change screens then wake up again. There are plenty of vids on youtube to help, if new screen doesn't activate, check flex cable is in square and all the way - have had this problem before also.
Click to expand...
Click to collapse
tnx... you answered all i was wondering about really appreciated
edit: ok so i riped it apart again and its a sony. for anyone who is wondering what might happen if the wrong screen is attached to the mobo watch this
https://www.youtube.com/watch?v=DHdtgu4rbxI
and the store said: why you dont just buy the "original" for 40€.... god i hate such people
Sent from my One X using Tapatalk

okhughes said:
That's the only downside - having to pull phone apart to check which one you have. Also another tip, phone need to be on to change LCD's, boot phone up with it apart, then wake up with power button on old screen, then sleep with power button, change screens then wake up again. There are plenty of vids on youtube to help, if new screen doesn't activate, check flex cable is in square and all the way - have had this problem before also.
Click to expand...
Click to collapse
I replaced my screen, but I powered down when removing the screen, and putting the replacement in. Now neither will light up. How do you solve this?

There are no guarantees with this, but try pulling the battery out for a minute or two. then with the original screen in, boot up and let it get to the lock screen wait for the screen to sleep then press power button to wake up then again to sleep. when the screen is sleeping try changing over the screens and then press power button to wake again. this is assuming that the screen displays on startup, but even if it doesn't try this process anyway. if it doesn't work, try doing with the new screen back to the old screen after pulling the battery. I have only ever come across this once, but it wasn't from powering down during a screen change, but pulling the battery seemed to fix it.

okhughes said:
There are no guarantees with this, but try pulling the battery out for a minute or two. then with the original screen in, boot up and let it get to the lock screen wait for the screen to sleep then press power button to wake up then again to sleep. when the screen is sleeping try changing over the screens and then press power button to wake again. this is assuming that the screen displays on startup, but even if it doesn't try this process anyway. if it doesn't work, try doing with the new screen back to the old screen after pulling the battery. I have only ever come across this once, but it wasn't from powering down during a screen change, but pulling the battery seemed to fix it.
Click to expand...
Click to collapse
I tried that, didn't work. I think I know the problem now. after searching on multiple forums, I think it's the 220 coil. A lot of people have had a similar issue, and they say they've solved it by replacing the coil. What I want to know is, how I managed to short the coil in the span of a few minutes, despite having used the same screen as the cracked one.

It is possible to do, although they can go for no reason, I recommend taking it somewhere to get coil replaced, it is a very fiddly job and you need to have a steady hand and the right tools (hot air gun) although my father managed to do one with a standard soldering iron, although it wasn't the best job. you risk damaging other components also if they blow off the mainboard (if you can find them), worst case scenario is the display ic has gone - that one will have to be done by a professional.

what a sh!t phone
we tried to repare it 2 years ago.
but failed.
so i just the pieces to gether wanted to see if i can fix it.
still not lcd just touchscreen (and now im not sure if i even have touchscreen lol maybe i broke that to now not sure
anyway sucks i have a brand new lcd touchscreen with frame we bought back then. and its even the right screen a green flex cable like the original one and still noting so i guess i broke the 220 chip thing how dont know. but not sure if i can replace it sucks it was a good phone
is there any help a easy fix? or do i really need to soldern that chip i cant sell the phone since there is personal data on it contacts and pictures (i guess dont remembrer)

It may still be replaceable, if it's been sitting for 2 headed is the phone taking a charge? It needs to be on to change the screen. If it is charging and booting up, and the screen still won't work when being changed try doing a hard reset by holding the power and volume down button until it restarts - have had advice by someone who repairs phones for a living that this should reset what the phone is looking at for hardware and you should be able to do screen replacement. Failing that chances are it's going to be dead. Not much point in selling it these days as they aren't worth much these days. If the phone won't start the battery may be dead flat. The phone needs some voltage to run its charging firmware, you can try to get it charging by leaving on charge for 10 min or more, even if no charge light, then hold power/vol up/vol down at the same time to recalibrate the charge circuit, it may start to charge after this.
Let me know how it goes, I wouldn't spend too much time on it, unless it's now a project..

okhughes said:
It may still be replaceable, if it's been sitting for 2 headed is the phone taking a charge? It needs to be on to change the screen. If it is charging and booting up, and the screen still won't work when being changed try doing a hard reset by holding the power and volume down button until it restarts - have had advice by someone who repairs phones for a living that this should reset what the phone is looking at for hardware and you should be able to do screen replacement. Failing that chances are it's going to be dead. Not much point in selling it these days as they aren't worth much these days. If the phone won't start the battery may be dead flat. The phone needs some voltage to run its charging firmware, you can try to get it charging by leaving on charge for 10 min or more, even if no charge light, then hold power/vol up/vol down at the same time to recalibrate the charge circuit, it may start to charge after this.
Let me know how it goes, I wouldn't spend too much time on it, unless it's now a project..
Click to expand...
Click to collapse
ow volum down? okay will try that. but i think i killed it lol cause the charging light wont come on anymore lol
it was just a idea that poped up in my head, that maybe i can save it so i friend can use it but i think i will just trow it away lol or something will give it a shot and see. will report back
nvm it's dead it wont even boot lol. i think i burned sometime lol that little cable that onder the battery thats conects the botem part with the other fliped out 2 time and 3time it smeled burned lol nvm

Sounds like it may have shorted, a replacement is fairly cheap , just depends on how serious you are about spending money on it.
I forgot to mention that when calibrating charge circuit with power/vol up/vol down all held down at the same time, they need to be held down for at least 2 minutes.

okhughes said:
Sounds like it may have shorted, a replacement is fairly cheap , just depends on how serious you are about spending money on it.
I forgot to mention that when calibrating charge circuit with power/vol up/vol down all held down at the same time, they need to be held down for at least 2 minutes.
Click to expand...
Click to collapse
nvm i think i fried the cpu or something lol it wont turn on anymore.
i trew it in the bin

Probably the best result, it's probably cheaper to to buy a second hand one and also cause less aggravation when you can't work out why it won't work. You could always sell the replacement screen.

okhughes said:
Probably the best result, it's probably cheaper to to buy a second hand one and also cause less aggravation when you can't work out why it won't work. You could always sell the replacement screen.
Click to expand...
Click to collapse
dont think i will sell it i mean who would buy it? lol but guess i could try for like 20euro or 10 lol.
and have 2 batteries for 10 or 5 euro lol
have 3 backcovers also 2 white and 1 black.
we bought every thing to repaire it but yeah.
could maybe sell some **** but pff dont knopw. (its my oncles old phone will ask him (maybe sell every thing exept de motherboard)

That's what I'd do, try and sell it for parts minus the mainboard. If that doesn't work, put it away somewhere and if you come across a dead one cheap, swap the mainboards out (providing it has the same screen - that's a given). Good luck with whatever you decide to do. :good:

Screen troubles after a tumble

The screen didn't break but after it fell it did look like the bottom left hand corner was visible darker than the rest of the screen. Today, almost a week after the initial tumble I decide to see if restarting it would fix the problem and it did but it lead to bigger problems. Now if the screen turns off for any reason it stays off until I do a hard reset by holding the power button for 10 seconds. When I try and turn it back on the captive buttons light up but nothing else happens. When the screen is on after a hard reset I'm unable to adjust the brightness level when I pull down the top.
How likely is it that the LCD ribbon came loose? It seemed like there were issues with it before.
I'm at a complete loss for what could be wrong with it. Any advice for recommendations would be greatly appreciated.
I'm really hoping I don't need any major repairs or even a new tablet because I can't afford much of anything.

My grandson recently had a tantrum and threw down my tablet. Afterwards the screen was flickering so I decided to restart it to see if that would fix it. The screen never came back on although I could hear it start up sounds and the capacitive buttons would light up. To make the story short, i contacted Samsung and they said it would be a standard $200 repair fee unless they found a loose cable. Today my credit card was charged $59 dollars by Samsung. I guess it was just the loose cable. Note that they sent me a prepaid UPS label to send it back to them and they are shipping it back to me all within that $59 charge. Well worth it for a great tablet.
Sent from my SM-T800 using Tapatalk

You got to remove the back and disconnect the lcd and battery cables and reconnect them after 10 seconds and all should be good. This happened to me after I got the screen of death. I dropped it and the screen did it again. So I just disconnected them both, reconnected, and everything works fine.

bh87771 said:
You got to remove the back and disconnect the lcd and battery cables and reconnect them after 10 seconds and all should be good. This happened to me after I got the screen of death. I dropped it and the screen did it again. So I just disconnected them both, reconnected, and everything works fine.
Click to expand...
Click to collapse
Can you recommend any guides & kits that I can purchase from amazon to help me take the tablet a part?

YouTube it. It is real easy removing the back, patience is needed.

Yes go to youtube for the disassembly videos. I bought a generic repair kit from ifixit for the tools. Though guitar picks can also work well.
Basically when you drop it a cable gets loose. You just have to disconnect and reconnect it.
Mine was very clearly only half connected (not in the picture which is from when I replaced the battery). I also disconnected and reconnected the battery and lcd connectors to make sure. But the loose cable was on the top left and didn't seem to be one of those. Just reseat them all to be sure.
There is another thread on here about disassembly which has pictures that I used as reference.
I've had mine apart twice. Once when I dropped it and once when I replaced the battery for poor battery performance (this really was sooo worth it).

I just received a used Note today and was about to initiate a return because the screen was completely dark but the rest of the tablet seemed to be working, including touch. Removed the back, reseated the ribbon cable, and everything's good now.
Strange start to my experience with this tablet.

Got an interesting problem.

Hey there. I'm a bit new to this side of XDA. Honestly with how long I've been AWOL from this site nothing is familiar anymore. How time flies. Well my first post back in years couldnt be more unfortunate phone wise, I've had my Z2 for a couple of months now and as a mechanic it's been treated like all my others phones prior, rough. I've been locally recognized as the guy who has a new phone every couple of months because he can't not shatter a phone. An expensive hobby of breaking phones. Well luckily I didn't shatter my Z2. I just water logged it. Gotta change things up right? So here's where the interesting problem comes in, I let the phone sit in rice for 30 hours, switching the rice out half way through. It acted up like you would expect in the first couple of hours but then stopped. When I pulled the phone out I scraped the rice out of all the books and crannies and tried to power it on, to no avail. Dead battery I assume, so I plug it in. Charge icon pops up, a sign of life! How glorious. So I let it sit for a minute as I assume the battery probably dropped below minimum voltage when the LEDs were freaking out. Went back to the phone, held the power button and no screen, but "Hello, Moto!" So at this point I'm convinced the screen is dead, so I force it off with the volume down method and pry off the screen. To find what? More water. Good Lord. This phone is incredibly water resistant just in reverse. So I do the only thing that makes sense at this point, I remove the ribbion connector from the board for the display and put the phone back in new rice as 2 separate pieces. I then leave it in there for another 30 hours switching the rice halfway. Bringing us to now. I took the phone out, cleaned all the rice out of the 2 pieces and off the remaining adhesive and connected the ribbion back to the board. Plug the charger in, and again, charging logo. But then I hold the power button and the TMobile splash screen pops up! Then the screen goes dead and once again, "Hello, Moto!". But whats different is now when the boot sequence is finished I can interact with the phone and it works, shake for flashlight, enter my passcode (just by feel cause I'm good like that, ladies hmu), and the button responds with vibration. The phone is working but no screen. So at this point I'm sure, the display driver is done. I murdered it in cold daylight. So I shut it off and start looking around for new screens, in the midst of this I knock the phone and accidentally hit the power button, and it starts to boot up. T-Mobile spash screen, screen death, "Hello, Moto!", and nothing. Now that seems weird. Why would it work twice on the TMobile splash? So I decide I'll try putting it in fastboot for S&G's. Restart, put it in fastboot and the screen stays on. Beautiful and clear as day, all buttons work, everything reads fine, but, if I go to boot it or do anyother action than "retart bootloader", the cycle continues. T-Mobile, death, hello Moto, nothingness. Now at this point I'm okay with the phone being dead, it's fine, but I'm intrigued now. What would cause the screen to work just fine when in the bootloader and the TMobile splash screen, but die when it boots? The phone is very clearly working in the background. I logged in, used Google assistant, used the flashlight, pressed buttons on the dialer, all without the screen but with haptic feedback and audio. Could the graphical side of the main partition just be corrupt, or maybe the display driver is dead but the main board interacts with it differently during fastboot? I'm far from being knowledgeable on the hardware side of these things but I'm really genuinely interested in getting feedback here from anyone with an idea of what is going on. I'll post a video here in a half an hour or so when I finish up with dinner.

AFAinHD said:
...snip...
Click to expand...
Click to collapse
Well... It sounds like there is a short between the screen and the main board. It could have happened when you plugged it into power while parts were still wet causing a short to ground and frying a chip that controls display but not touch on the screen.
Best way I can describe it for you is if an ECU on a car got wet and shorted out. Everything works but you get an engine code for TPS sensor failure due to said short. (The ECU can't read TPS due to a short). That is what seems like what happened.

Uzephi said:
Well... It sounds like there is a short between the screen and the main board. It could have happened when you plugged it into power while parts were still wet causing a short to ground and frying a chip that controls display but not touch on the screen.
Best way I can describe it for you is if an ECU on a car got wet and shorted out. Everything works but you get an engine code for TPS sensor failure due to said short. (The ECU can't read TPS due to a short). That is what seems like what happened.
Click to expand...
Click to collapse
Well see I would think that as well but the screen does work. Just only in fastboot, and the boot logo.
I got the video here.

Fastboot is a pretty low level and most likely uses basic hardware. I mean really what is there to see but a simple background with some text. Once you load the OS then all the hardware and it's drivers into play. Have you tried booting into safemode? Ultimately you'll probably have to repair or replace, but there could be a slim chance that there's still a little moisture in there and it still has a short somewhere.