Develop Bugs

NEED a htc motherboard!

Where can i get a htc desire z/g2 motherboard??
i dropped my phone and something inside of it something got loose, now it wont charge or turn on

Just took it to a repair guy, he opened it up and said everything seems fine....no corrosion or anything from water...but the phone wont power on....any one here have any ideas? just shoot em, im willing to take anything

Ask HTC?

MacaronyMax said:
Ask HTC?
Click to expand...
Click to collapse
i tried, they wont cover accidental damage. And my warrantys been voided since someone opened it up..

I bought a second hand phone and it did turn on however there were a numbers of problems with my phone, it had a power button that didnt work, unresponsive parts on the lcd and a quiet in call speaker.
Your best bet before trying to replace the whole pcb is opening your phone using a teardown guide
http://tjworld.net/blog/htc-desire-z-tear-down
Make sure you read it a couple of times and go through the pics so you know what your dealing with, find the power button, make sure its intact and adjust the ribbon cables.
Otherwise just find a cell phone repairer on a classified ad like criagslist or kijiji.

TheToiletSpaula said:
I bought a second hand phone and it did turn on however there were a numbers of problems with my phone, it had a power button that didnt work, unresponsive parts on the lcd and a quiet in call speaker.
Your best bet before trying to replace the whole pcb is opening your phone using a teardown guide
http://tjworld.net/blog/htc-desire-z-tear-down
Make sure you read it a couple of times and go through the pics so you know what your dealing with, find the power button, make sure its intact and adjust the ribbon cables.
Otherwise just find a cell phone repairer on a classified ad like criagslist or kijiji.
Click to expand...
Click to collapse
i had someone take apart the phone and they said everything inside looked good. Im going to take it to another place tommorow and see if they can fix it....otherwise this is the 2nd smartphone that died on me. HTC told me to go to Bell...and i bought this phone 2nd hand. Trying to send my Galaxy S in was a Pain....anyone here know of good 3rd party repair services in Ontario?

jark99 said:
i had someone take apart the phone and they said everything inside looked good. Im going to take it to another place tommorow and see if they can fix it....otherwise this is the 2nd smartphone that died on me. HTC told me to go to Bell...and i bought this phone 2nd hand. Trying to send my Galaxy S in was a Pain....anyone here know of good 3rd party repair services in Ontario?
Click to expand...
Click to collapse
I hate to say it, but it was second hand for a reason. Ever try switching the battery? How about changing the power supply?

melodicjunkie said:
I hate to say it, but it was second hand for a reason. Ever try switching the battery? How about changing the power supply?
Click to expand...
Click to collapse
Yes. Start simple. First check your electron hose to make sure you are getting power to the device. Also check the battery as well as the prongs that connect with the battery tabs. If things are good there, then think about tearing into the phone.

melodicjunkie said:
I hate to say it, but it was second hand for a reason. Ever try switching the battery? How about changing the power supply?
Click to expand...
Click to collapse
no no, dont say that. This phone was fine for 3 months, i dropped it at a club i went to and water got inside the phone....i took it to 3 repair people and they all said the Main PCB motherboard is damanged (water) soo does anyone have any idea where i can find a motherboard?? i have no problem with costs of replacing it. As long as its not more than the phone itself.

jark99 said:
no no, dont say that. This phone was fine for 3 months, i dropped it at a club i went to and water got inside the phone....i took it to 3 repair people and they all said the Main PCB motherboard is damanged (water) soo does anyone have any idea where i can find a motherboard?? i have no problem with costs of replacing it. As long as its not more than the phone itself.
Click to expand...
Click to collapse
You didn't mention water damage in the OP. You said something was loose. Water damage is completly different.
Try ebay.

Hey i found these 3 ads on ebay...do you guys think that a swap of the motherboards would be fine? heres the ads. I contacted the seller and they said the battery was used and thats it but phone seemes operational....i know its a risk, but is it worth it guys?
..need help on this one.

why swap the motherboards if the new phone is working fine. Just transfer data and you're done surely?

elliott2705 said:
why swap the motherboards if the new phone is working fine. Just transfer data and you're done surely?
Click to expand...
Click to collapse
Reason being the other phones have minor problems, like speaker doesnt work, or some of those phones wont pick up signals and i think thats due to a bad radio flash or if i just flash a radio everything should be working fine.

can someone please clarify this? if i buy a phone with a speaker problem and transfer the main PCB board to my old phone...will there still be a speaker problem? or is the speaker a separate unit itself and not related to the pcb board?

jark99 said:
can someone please clarify this? if i buy a phone with a speaker problem and transfer the main PCB board to my old phone...will there still be a speaker problem? or is the speaker a separate unit itself and not related to the pcb board?
Click to expand...
Click to collapse
If am correct the speaker is a separate component
Sent from my HTC Vision using XDA Premium App

lainvalenajr said:
If am correct the speaker is a separate component
Sent from my HTC Vision using XDA Premium App
Click to expand...
Click to collapse
one of the phones i am bidding for says it might not be able to guarantee a connection to mobile network (send sms,make calls) could that be a radio flash problem? would i be able to fix that??
another is one of the phones boots on and shuts off, i take it that could be a bad flash or something? its only about $20. just trying to weigh my options cause the new phones are lkike bidding for $350 lol im not that rich yet

I found out that my MOTHERBOARD is fine. There was water damage but not enough to go inside to the main board! My dad tested the battery voltage and found i wasnt getting any voltage.
i went to future shop and found a lady to let me use her battery and sure enough the battery was working and phone powered on!!! so i guess my battery was shot from dropping and popping out of phone while recording a video.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330551036273
ordered these from ebay....are they any good? they look decent

Those look like the batteries I got. They were about 1/2 of the claimed mah rating. Worst case, they wiill get you running, and that charger is pretty good.
Sent from my T-Mobile G2 using Tapatalk

That is why you bring a secondary phone to the club. Just sayin'.
BB Bold for the club, G2 for work and school, Iphone 4 for at home / chilling with friends.

convolution said:
BB Bold for the club, G2 for work and school, Iphone 4 for at home / chilling with friends.
Click to expand...
Click to collapse
So, made of money you are? Support your favorite ROM developer you should.
Sent from my HTC Vision using Tapatalk

[Q] DHD booting, but no display activity. How to repair?

Hi all. In need of a bit of advice here. Hope this is in the right forum.
My beloved DHD has suffered from one too many falls. Despite being protected in an Otterbox Commuter case, he now lies on his deathbed. Even though I was considering an upgrade, I'm thinking I might want to stretch out his life for as long as possible instead. So I've come here to ask for repair advice.
- The phone seems structurally sound from the outside, no damage besides minor aesthetic scratches from before the phone was protected by the Otterbox.
- It appears to boot. Makes the vibration noise etc. Heck the alarm even went off the other morning, at the set time of 0630.
- Screen does not function at all. Lifeless. But not broken in any way externally. Because of this, had to pull the battery to shut the alarm off.
- When plugged in to charge, charging light indicator does not illuminate.
Any ideas?

Sent from my nipple running windows 95 NT.

Cheers, although I'm gonna try a different approach for now.
Any ideas? Can anyone point me in the right direction of some advice?

Sounds like 2 things. Broken lcd and a broken charging port. It wouldn't be worth repairing. You could buy one second hand on ebay for aboot £120.
Sent from my nipple running windows 95 NT.

Thanks for that. Considering trying to sell it broken, for parts. Only thing that concerns me is any sensitive data that may be readily accessed by someone who knows how to get to it.
Is there a way to wipe it?

You could use another dhd with the same firmware and copy the key/button presses and reset it in bootloader mode.
Sent from my laser emitting mammary glands.

Could also be that the connector for the screen has been dislodged due to being drop to many times you mite try opening it up and see if it is that.

lincolnep said:
Could also be that the connector for the screen has been dislodged due to being drop to many times you mite try opening it up and see if it is that.
Click to expand...
Click to collapse
Hi, thanks for the response. So I assume you're referring to this part here?
http://www.parts4repair.com/htc-desire-hd-lcd-screen-fpc-connector/
Seen in this disassembly video from the 3:05 minute mark?
http://www.youtube.com/watch?v=JfatoeWbMRk

bump...

I have a problem similar to yours. But in my case, I'd turned the phone off to go to the cinema and the LCD and touch never turned on again.
In order to erase your data, did you try overwriting a stock rom? (In case it's just the charging LED that is broken)

That sucks! Self detonating phone. Does yours still vibrate and 'turn on'?
Haven't actually managed to clear the data. I'm ordering this part here (http://www.parts4repair.com/htc-desire-hd-lcd-screen-fpc-connector/) and I'm going to attempt to pull it apart and fix it.
If I can get it to work again I'll sell the One V I'm using and go back to the old faithful!

Well this saves me from starting a new thread haha
Anyway i am having the exact same problem as you have.
My dad brought home a Desire HD from work wich was not working so i am trying to fix it.
The phone boots, it vibrates ones and after a minute it makes the boot sound.
But nothing responses and the lights wont turn on.
Also no charging light..
Also it does not charge but usb does connect.
Could this be the FPC connector or the screen?

Hmmm...interesting, exact same issue as mine.
Well, I've ordered the FPC connector replacement part I linked above...going to attempt to play around with it when it arrives and see if I can breathe new life into the phone. So I can tell you how that goes...
Although:
1. Would the charging light and screen problem be connected? Is this feasible? Or does it suggest something else is likely shot?
2. I believe the FPC connector requires a solder to replace. This could be a bit ambitious on my part to attempt to repair...any ideas on what sort of a solder would be suitable?
Sent from my HTC One V using xda premium

suitup said:
Hmmm...interesting, exact same issue as mine.
Well, I've ordered the FPC connector replacement part I linked above...going to attempt to play around with it when it arrives and see if I can breathe new life into the phone. So I can tell you how that goes...
Although:
1. Would the charging light and screen problem be connected? Is this feasible? Or does it suggest something else is likely shot?
2. I believe the FPC connector requires a solder to replace. This could be a bit ambitious on my part to attempt to repair...any ideas on what sort of a solder would be suitable?
Sent from my HTC One V using xda premium
Click to expand...
Click to collapse
no clean flux core solder would work best, preferably something very thin (about .015"). A small bottle of noclean flux would also help and you probably will need lead free solder as that is likely what they used on the board to begin with, and lead and leadfree dont typically mix as well.

Thanks for the quick reply...
Something like this?
http://www.oritech.com.au/productDetail.aspx?productID=23244
What sort of iron would be suited? Would any of these suit?
http://www.oritech.com.au/categories.aspx?categoryID=321
Would you say it'd be a difficult process? I've soldered before, but a that was a while ago in high school...
Also the cost of all this equipment will far outweigh the cost of the $3 FPC connector spare!

suitup said:
Thanks for the quick reply...
Something like this?
http://www.oritech.com.au/productDetail.aspx?productID=23244
What sort of iron would be suited? Would any of these suit?
http://www.oritech.com.au/categories.aspx?categoryID=321
Would you say it'd be a difficult process? I've soldered before, but a that was a while ago in high school...
Also the cost of all this equipment will far outweigh the cost of the $3 FPC connector spare!
Click to expand...
Click to collapse
yes, those should both work fine. ya it is costly for equipment. i have a edsyn iron i use at home and solder i get from work. i would say it can be tricky, i havent seen the connector but im sure its similar to other inline ribbon connectors. remember, short burst soldering, heating it for too long will take the pad off the pcb, and repairing THAT can become very difficult.

suitup said:
Hmmm...interesting, exact same issue as mine.
Well, I've ordered the FPC connector replacement part I linked above...going to attempt to play around with it when it arrives and see if I can breathe new life into the phone. So I can tell you how that goes...
Although:
1. Would the charging light and screen problem be connected? Is this feasible? Or does it suggest something else is likely shot?
2. I believe the FPC connector requires a solder to replace. This could be a bit ambitious on my part to attempt to repair...any ideas on what sort of a solder would be suitable?
Sent from my HTC One V using xda premium
Click to expand...
Click to collapse
Thanks. We have a spare DHD with broken glass here wich my sister is using unter her SGS is back from repair. Will swap the motherboard when her phone is back.
Sent from my HTC Vision using xda premium

[Q] Galaxy Nexus Volume button problem

Hi everyone,
I am new (noob) user of XDA Deceloppers. If this thread is posted in the wrong category, I'm sorry but I did not know which one to chose D:.
To start, I have a Galaxy Nexus GSM. It is rooted. Stock ROM and stock Kernel.
It is running an OTA 4.1.1 Jelly Bean.
I recently installed a Skinomi wet applicated screen protector on my Gnex. I watched a lot of videos on how to apply wet applicated screen protectors. I am very prudent with applying those stuff. I followed all Skinomi's instructions. I know I did everything right. After applying it, I waited two full days (48 hours) before booting my Gnex back up.
Now, the problem. My volume button is getting weird. Pressing down is flawless, but when I press up, it works only 1/2. The rest works fine. I dont know why it gets like that.
The second problem. I have all the accessories that came with the phone, but not the receipt. I bought it used...
I emailed Skinomi and the seller for help, but no reply up to date.
I love this phone but... this problem is pretty annoying.
Please help me!

Water and phones are not good together.
Sent from my Xoom using xda premium

Winesnob said:
Water and phones are not good together.
Sent from my Xoom using xda premium
Click to expand...
Click to collapse
Yeah, I knew that, but after reading a lot of success from others, I wanted to try. This would be my lastvl time with wet screen protectors. Too much to worry for it, and its expensive. Any solution guys?

tonytober said:
Yeah, I knew that, but after reading a lot of success from others, I wanted to try. This would be my lastvl time with wet screen protectors. Too much to worry for it, and its expensive. Any solution guys?
Click to expand...
Click to collapse
See if you can take the battery out and leave the phone in a ziplock bag packed with rice for a few days.
Or you can try taking the battery out and using a hair dryer to blow hot air into the volume rocker.
Was this a full body protection kit or just the screen? A ton of people have had issues with the power button and volume rocker after applying a wet screen protector, and I have no idea why these companies don't tell you to cover both with a piece of tape or something before hand, as water getting into the crevices of the device is never a good thing.

MMcCraryNJ said:
See if you can take the battery out and leave the phone in a ziplock bag packed with rice for a few days.
Or you can try taking the battery out and using a hair dryer to blow hot air into the volume rocker.
Was this a full body protection kit or just the screen? A ton of people have had issues with the power button and volume rocker after applying a wet screen protector, and I have no idea why these companies don't tell you to cover both with a piece of tape or something before hand, as water getting into the crevices of the device is never a good thing.
Click to expand...
Click to collapse
Thanks for a fast response
I will try to put my phone in rice, because hairdryer might be too strong.
Its a screen only protector.
They never told me to tape the buttons! What a good idea.
What would be the worst solution if everything fails?
Is replacing the volume flex hard?
Im so scared!!! I love my phone so much. :'( please help me!!!!

Same thing has been happening with my phone for 6 or so months now. Spilled a small amount of water on my phone. Wiped it off and everything works fine but the volume up button is very finicky, not a huge problem just have to tap up 2 or 3 times sometimes to get the volume on.
Sent from my Galaxy Nexus using Tapatalk 2

Still using your phone like that?
I really respect you as you can use your phone like that. I just can't stand it. Help!

My recent move
I just bought a new flex volume cable off ebay (cannot link yet, don't have the permission). The seller is 123phone.
I am pretty sure that the cable is damaged, and 5$ is worth a try. Does anyone here tried to solder it? It will be my first time soldering a flex cable, but I have already dont some soldering before. Any tips for the replacement of the flex cable?
Thanks for helping guys. I'm really stressed :S

tonytober, I have the exact same issue, only the volume up rocker and it intermittently works.
Did you try to install the flex volume cable, did it work?
tonytober said:
I just bought a new flex volume cable off ebay (cannot link yet, don't have the permission). The seller is 123phone.
I am pretty sure that the cable is damaged, and 5$ is worth a try. Does anyone here tried to solder it? It will be my first time soldering a flex cable, but I have already dont some soldering before. Any tips for the replacement of the flex cable?
Thanks for helping guys. I'm really stressed :S
Click to expand...
Click to collapse

Winesnob said:
Water and phones are not good together.
Sent from my Xoom using xda premium
Click to expand...
Click to collapse
Well my phone got wet and was laying in water for a day or so ( Just a little pool) And i just waited for a week or something and then it started and everything worked so water + gnex = Nothing bad, but nothing good

Please read forum rules before posting
Questions go in Q&A
Thread moved
Thank you for your cooperation
Friendly Neighborhood Moderator

baruf12 said:
tonytober, I have the exact same issue, only the volume up rocker and it intermittently works.
Did you try to install the flex volume cable, did it work?
Click to expand...
Click to collapse
Sorry for a late reply. Yes I replaced the flex cable and now it works fine.
I will never buy a wet screen protector anymore. Worriness for nothing!
Replacing the flex is not that hard and can be found on eBay for under 8$ so it was pretty fine for me.

tonytober said:
Sorry for a late reply. Yes I replaced the flex cable and now it works fine.
I will never buy a wet screen protector anymore. Worriness for nothing!
Replacing the flex is not that hard and can be found on eBay for under 8$ so it was pretty fine for me.
Click to expand...
Click to collapse
Hi Tonytober,
I also need to replace mine but have never soldered before. Can you advise how you did it and what tools i would need? is it just the 3 soldering points? i saw the volume flex cable is cheap enough on ebay, its the soldering im worried about!
Thanks
DC

dcsworld said:
Hi Tonytober,
I also need to replace mine but have never soldered before. Can you advise how you did it and what tools i would need? is it just the 3 soldering points? i saw the volume flex cable is cheap enough on ebay, its the soldering im worried about!
Thanks
DC
Click to expand...
Click to collapse
Soldering is not hard unless you shake a lot. Lol!
For soldering, you need a soldering iron, some lead and your brain (actually, just be careful not to burn yourself).
Sold soldering promoter could help (it's a paste that you could put on the phone to help the lead stick on the phone)
Watch out to not let the iron on the phone too long (stop soldering every 10 seconds lets suppose, rest 10 sec, solder 10 sec) as you don't want to damage your logic board to repair an 8$ ribbon! :laugh:
So yeah.
Open the soldering iron, let it heat up (2 minutes to be safe and chill)
-Heat up the spots where you have to solder on the Gnex's board (3-5 seconds)
-Apply some paste with a Q-tip or a toothpick on the heated spot on the Gnex's board
-Here's a tricky part: use BOTH hands for this (only "hard" part which is not hard, just be careful to not use too much lead):
One hand holds the soldering iron and apply heat on Gnex's board, while the soldering iron's tip is STILL on the Gnex's board, with the OTHER hand, apply lead DIRECTLY on the spot where you need to bond the ribbon-board with the lead. Just put enough that it sticks.
**Tip: When the liquid lead between the ribbon+board (where you soldered) hides the space between them (like glueing paper), blow on the liquid lead. It will make it bond one shot and Voila, it is done.
Just do it nice and slow if it is your first time. The only dangers:
-Don't burn yourself, don't kill yourself. I'm not responsible for any injuries, or Death. ...
-Don't burn the Logic Board (like I told you, 10 seconds solder, 10 seconds cooldown...)
-Don't oversolder (If you boot up with oversolder you might bond two connections and short your phone's Logic board and... your phone will RIP.
In case if you oversolder, don't panic, lead is like a magnet to the iron. Just take your soldering iron and heat up the lead. The iron will suck it up.
After that, take a damp cloth and wipe the soldering iron's tip. Don't burn yourself!!!
When everything's done, before you mount your phone, test it. Don't waste your time screwing and unscrewing the phone
If the phone works, clean the soldering iron's tip with a damp cloth when it is still warm-hot.
If the phone works, ENJOY!!!!!!!!
Hope it helps. Keep me updated with your phone.
Nexus lover, Tony

tonytober said:
Soldering is not hard unless you shake a lot. Lol!
For soldering, you need a soldering iron, some lead and your brain (actually, just be careful not to burn yourself).
Sold soldering promoter could help (it's a paste that you could put on the phone to help the lead stick on the phone)
Watch out to not let the iron on the phone too long (stop soldering every 10 seconds lets suppose, rest 10 sec, solder 10 sec) as you don't want to damage your logic board to repair an 8$ ribbon! :laugh:
So yeah.
Open the soldering iron, let it heat up (2 minutes to be safe and chill)
-Heat up the spots where you have to solder on the Gnex's board (3-5 seconds)
-Apply some paste with a Q-tip or a toothpick on the heated spot on the Gnex's board
-Here's a tricky part: use BOTH hands for this (only "hard" part which is not hard, just be careful to not use too much lead):
One hand holds the soldering iron and apply heat on Gnex's board, while the soldering iron's tip is STILL on the Gnex's board, with the OTHER hand, apply lead DIRECTLY on the spot where you need to bond the ribbon-board with the lead. Just put enough that it sticks.
**Tip: When the liquid lead between the ribbon+board (where you soldered) hides the space between them (like glueing paper), blow on the liquid lead. It will make it bond one shot and Voila, it is done.
Just do it nice and slow if it is your first time. The only dangers:
-Don't burn yourself, don't kill yourself. I'm not responsible for any injuries, or Death. ...
-Don't burn the Logic Board (like I told you, 10 seconds solder, 10 seconds cooldown...)
-Don't oversolder (If you boot up with oversolder you might bond two connections and short your phone's Logic board and... your phone will RIP.
In case if you oversolder, don't panic, lead is like a magnet to the iron. Just take your soldering iron and heat up the lead. The iron will suck it up.
After that, take a damp cloth and wipe the soldering iron's tip. Don't burn yourself!!!
When everything's done, before you mount your phone, test it. Don't waste your time screwing and unscrewing the phone
If the phone works, clean the soldering iron's tip with a damp cloth when it is still warm-hot.
If the phone works, ENJOY!!!!!!!!
Hope it helps. Keep me updated with your phone.
Nexus lover, Tony
Click to expand...
Click to collapse
Thanks a lot for the advice. It gives me more confidence to try it. Really annoyed that i didnt notice the volume cable was soldered onto the main board, i was following the wrong youtube video which was disassembling a different nexus variation
I'm glad you mentioned that the lead is applied to the soldering point, i always thought the a bit of lead was first melted onto the iron and then transferred onto the soldering point.
I'll give it a shot once i have all the parts and update the thread on the results
Thanks
DC

dcsworld said:
Thanks a lot for the advice. It gives me more confidence to try it. Really annoyed that i didnt notice the volume cable was soldered onto the main board, i was following the wrong youtube video which was disassembling a different nexus variation
I'm glad you mentioned that the lead is applied to the soldering point, i always thought the a bit of lead was first melted onto the iron and then transferred onto the soldering point.
I'll give it a shot once i have all the parts and update the thread on the results
Thanks
DC
Click to expand...
Click to collapse
No problem at all. The Gnex should rather be fixed than be thrown away, auch a good phone
Tell me when you did it! Hope you get it fixed soon. If something goes wrong or you have any questions, ask!!! Xda'a here for that.
Tony

I finally got round to attempting this and it ended up a failure
First of all i noticed i only had 2 soldering points (metal bits) on the main pcb board (the middle one was missing) and the new volume cable had 3, so the middle one must have been pulled off with the old volume cable, Anyway, i decided to go ahead and try soldering the 2 outer connections.
1st attempt, i managed to make the 2 connections, although it looked very messy. Tested them and the volume down button was working! unfortunately the volume up button was not. So i heated the iron up again and attempted to apply more solder to the connections hoping this would improve the connection. Result: both buttons not working! the whole area is black now on both the main board and the volume cable, so i must have damaged all the soldering points and broken the working connection in the process. i found the solder was sticking to the iron forming blobs of hot solder rather than where i wanted the connection to be made. i must have been doing something wrong
Hmm i think im just going to live without the buttons now and rely on the volume controls within the rom until the next nexus is out. Might even volume cable and attempt this again at that point.
Thanks a lot for your help anyway, it was useful experience!

[Q] Transplant Surgery - T999 mainboard into SCH-I535/SPH-L710 body

I have been looking around, but no place specifically answers this exact question.
Long story short I have a t-mobile Mainboard that I want to save from a phone with a broken screen that I have. From what I understand the other components work as well (camera, speaker and whatever else). I understand that I can purchase an LCD/digitizer with assembly and carefully place the components into there to make sure the phone works but it would cost me around $120 for the parts + whatever time it takes me to replace the components. My second option which I am asking to see if it is indeed possible, would be to take the mainboard from the T-999 and replace it with a SCH-I535/SPH-L710 that I would purchase (most likely with bad ESN - costing me the same amount) but it would mean that I would not have to deal with screen replacement and I have a higher likelihood of having a good quality screen. (I have never been happy with the quality of screen replacements from ebay). It makes no difference if it doesn't work, but someone with the experience of working with different models should be able to answer this question.

Why not buy T999 with bad ESN ?

Perseus71 said:
Why not buy T999 with bad ESN ?
Click to expand...
Click to collapse
I am trying but T999 with bad IMEI's are not only more expensive but a lot of them also have broken screens so im back where I started. I am just stating these two because I can find them cheaply and easy to find as well.

In that case, you could try taking the Display & Digitizer from those phones and put it in your phone. Don't try to transplant your motherboard into that phone unless you have a good reason to do so.

It functions but you have to use a case and...
I did this a about a week ago. Here's how it went.
I bought a SPH-L710 without realizing it did not have a sim card slot. The screen had one slight crack and everything else worked.
After receiving it, I bought a T999 with a cracked screen/ non-working digitizer and everything else worked (the seller heard sounds when it powered on.)
I disassembled both and put the T999 mainboard on the L710 screen digitizer. Most of the screws line up. The two screws that don't line up are:
1. at the bottom near the TOP of the USB port. The hole in the board and the hole in the digitizer are on opposite sides of the USB port. This cannot be remedied, where the screw goes through the board, there's no hole on the digitizer, and you can't put a hole through the mainboard to meet up with the one on the digitizer. You could try but I think there's a circuit on the board there, or not enough room.
The two holes on the SIDES of the USB port will line up only when you squeeze thee mainboard and digitizer together while installing the screws.
2. on the side near the power button, there is a screw that goes there, but on the T999 mainboard near where the screw goes, there's something that looks like a button cell battery about 3mm wide and 1.5-2mm tall. It stuck in a hole made for it in the T999 digitizer, but the L710 digitizer does not have a recess in it to fit this button cell so the T999 mainboard sticks up slightly, enough that if you put the screw in the hole in the side, then the power switch on the mainboard will not stick down far enough, and when you push the power button on the outside of the case, it won't engage the power switch on the mainboard. To remedy this, leave out the screw on the side of the mainboard.
Because the mainboard is slightly bent due to the button cell battery, you need to have a case that compresses the phone together so the power button will engage the power switch properly. I used a "waterproof" chinese knockoff case I got on e$ay for $13. It's not waterproof, but the phone didn't get ruined even thought I tested the waterproof-ness of the case before I put the phone in and it passed, so maybe a genuine otterbox case would have been better. But the case does OK to compress everything enough that the power button and power switch work all the time. With the case on, you can't tell the phone is missing screws internally.
Verdict: everything works properly except the camera doesn't focus properly, it only works in Macro focus, I don't know if I should take the camera module from the L710 and try it or if it won't move because of the stress of the mainboard being slightly bent all time due to the button cell battery. It did focus properly for the few few days I had it.
One other issue: I can't get Windows 7 to recognize it, so I can't use Odin to root it, I've tried all the drivers, I've tried all the modes. I have no idea if this is a Windows issue or if it is somehow caused by the Frankenstein's Monster-ness of the hardware.
So yes, it can be done, with a "rugged" style case and with a few issues. I have no experience with the I535 at all.
I hope this helps,
rollinns

I could not have asked for a better reply. Thanks so much!!!!

Glad I could help
I was looking for this info about 3 weeks ago and didn't really look that hard since i was pretty sure everyone would give me the same replies you got before I replied. But for my entire life I've been asking questions no one else has asked, so I'm used to just having to do stuff to get answers. In this case, it helped you too.
If I had to do it over again, I think I'd try the whole process w/o the L710 parts. Maybe the I535 will work, and I still could drill a recess into the L710 digitizer if I had a mill, but I don't have access to mine now and won't for a while, and I'm not sure I trust the drill press to not crack the digitizer.
Also - NFC is less reliable than it was with my S2, meaning it doesn't work all the time - it's harder to beam contact info to another phone, but QI wireless charging works flawlessly.
My hope is to put some NFC tags in the truck along with a wireless charger so I can listen to internet radio as I drive, i.e. - a tag to turn off wifi, turn on bluetooth, turn on the app that streams music to my JVC car stereo and turn on the "TuneIn" app. and then I can still charge my phone without worrying about wires.

Black screen, only backlight works. Everything else is ok.

Hi
Sorry for my english, I'm hungarian, this is the best I can do.
So I bought a cheap (but not too cheap) SM-P905, but I can't get the screen to work properly.
The touch layer, the spen, the backlight works well, I managed to mirror the screen on my pc and everything else seems to be okay.
I got off the back cover, I tried to unplug and reattach every flex cable, even the battery. I tried to look everything under magnifying glass to see what could be the problem.
The lcd flex connector looks like this under my lens.
(Upload it in the next post, not working from the android app)
I tried to clean it with a needle, but it still looks like it is corroded or melted.
Is it possible that replacing this connector will get the screen back to normal? (I found flex connector replacement on the internet)
Or is it possible to repair it with some jumpers or something like this?
Is it melted because of some shorted circuit somewhere else, or because of a bad micro capacitor?
How and where can I locate and resolve this problem (s)? Maybe is it still the lcd that is simply dead and I can't bring it back to life?
I dont want to buy a screen, and a motherboard (neither only one of them )
Thank you for your help!

Okay the forum doesnt let me to insert links or photos, because I'm new here -.-
/s/53oab9sykbihn32/20151021_175009.jpg?dl=0 write dropbox dot com in front of link

https://www.dropbox.com/s/53oab9sykbihn32/20151021_175009.jpg?dl=0
In my opinion it died!!

I hoped for better opinions
I wanted to know how this thing can die?
It has to be caused by something.
Bad resistor/capacitor? Is it on the motherboard or on the lcd's circuitboard?? Or is it only the corroded flex connector??
I dont want to throw the whole tablet in the trash. Everything else is just operating fine.
If nobody can answer this, where should I write, where people can help with these very small components / resoldering / measuring what gone wrong here?

Alan-B said:
In my opinion it died!!
Click to expand...
Click to collapse
So today I measured the pins in worst condition. There are 2 pins that I tought can cause the problem and looks corroded. (Number 5 and 9 from the right) Both of them !are not used!. (There is a total of 3 pins that are not used on the connector/cable)
They are not lead through the flex cable, they have no function here.
So the problem comes from somewhere else, but I still don't know why they look like this.
Maybe I will try to seperate the screen from the body and look at it closer and its connectors/smaller circuit boards.
Sent from my SM-N9005 using XDA Free mobile app

Hmm, that pic does not make me think its a corrosion problem. At best, it can lead to a finicky connection, but there seems to be enough there for proper electrical contact. If this were a headphone jack, for example, I would say apply pressure near the cable to see if the headset works properly, and if it does, then I know its a cable problem. No idea if you can try to apply pressure to the cable and see if the LCD turns on.
If the screen mirrors on the TV successfully, then there are a bunch of Samsung Service Codes you can use to test the LCD. Unfortunately I do not know them for this model, but google should get you the service menu very easily. There is definitely a test in there for the LCD that should give you a better idea what to expect.
If the cable is pretty cheap, I would also just pick up one and try replacing. Nothing to lose! AND if you have access to another identical device, you can try to stick this LCD on that device to see if its the LCD thats the problem or the motherboard.
Lastly, I would want to know if the glass on that LCD has ever been replaced. If they did a glass only replacement, its possible they overheated the LCD ... OR used too much LOCA glue that shorted the connectors.
Many possibilities, so I wouldn't call it a day yet. First, look for the service menu, thats the best place to begin.

I will try the service codes.
Unfortunately I don't have more devices. The easiest way would be to test the identical parts on a working one, but I don't know anyone who would risk his/her tablet for this
The other thing I can do is to get another lcd-glass unit from ebay or from ifixit and try it. If the problem was the lcd, it should work, I'm happy, but if its black, I will have (maybe) 2 working lcd units for sale. Or I have to get a new motherboard (sounds expansive).
I don't think that they replaced the glass on this device, it looks very used and scratchy, so it was working before.
Thank you for taking your time for me and answering my dumb questions!!
Sent from my SM-N9005 using XDA Free mobile app

There are more good news than bad, so I'm very happy.
So 1-2 days ago I started to get off the screen to see if I can seperate the LCD from the receiver. Turned out its not that hard. The only hard thing is to get it off the body in one piece. Lots of heating with a hair drier, and a LOT OF PATIENCE. If you can get it off in one piece you are on your way.
Seperating the glass from the LCD is very easy, did it in 10 minutes, I don't think it needs heating...
So I did it, then I saw some water damage (white things) on the back side of the LCD. There is a small board here too, so I cleaned the white thing off with some alcohol.
Then I put the lcd back and voilá, Its WORKING!!!
The only problem is that I damaged the touch screen glass, so I need to order a new one, but its under 20$ so no problem.
Thank you all for your help, I hope that I finished here
Sent from my SM-N9005 using XDA Free mobile app

Good to know! Thank you for the update

Other solution is remove battery five minute and reconnect battery