Develop Bugs

[Q] GNex will not charge / USB Host not recognised

Hey all
Wonder if anyone can shed any light on what I think is a unique problem - in that I can't find anyone with the exact same issue.
Last weekend I took the SIM card from my GN to place in another phone I was trying out. The GN was powered back on and being used on WIFI as I was doing comparisons, shooting some video of the new phone with it etc.
Popped the GN in a drawer without thinking and left if powered on
(see if you can guess where this is going)
Messed around with the other phone for about 4 days, got my GN out of the drawer and went to put the SIM back in my GN.
1. GN would not turn on initially at all. No recovery, nothing. (solved)
Read some posts on XDA and elsewhere, people with similar issues mentioning a long (5min+) battery pull would wake her up. Dutifully I obliged and the phone did indeed wake up. However, battery was totally dead and phone shut back down.
2. GN will not accept charge from a wall charger when phone is on.
Whilst the phone seems to take a 'trickle' charge whilst powered off (battery charge animation is on), this is exceptionally slow. Took all night to get to about 50% charged to allow me to boot up and have a look around. Whilst the phone is powered on, it will not recharge. tried all sorts of official and other USB and mains cables.
3. When connected to a PC via USB, will accept charge, but error message notes that USB Device not reconised, troubleshoot? etc...
Phone won't mount. Status says it is charging over AC.
So what's up? I assume the battery died big time over the 4 days i left it. A have a new official battery in the post to resolve but... didn't anticipate the issues with USB connection etc. Worried the phone might be partially bricked/borked/knackered.
Phone is GSM 16Gb currently on 4.0.2 and totally stock. So no tinkering to date has caused this. Only event that proceeded the issue was the full battery drain.
Any hints / tips / info / moral support gladly accepted.

Really sounds like you're phone was already borked, just waiting for the right time to tell you. You might've hurt it's feelings.
Sent from my Galaxy Nexus using XDA App

Sounds like it's emotionally scarred from being abandoned for another phone and left in a cold dark danky drawer for half a week.
Have you tried reinstalling the USB drivers?
Also could try factory reset as well as try unlocking it and relocking. Worst case, send it in repair, just tell them it's heartbroken.

Heartbroken, I like it... Worse still I was testing out a Windows Phone. What a phone philanderer I am.
The drawer was nice and dry though I assure you.
How would I install USB drivers?
Sent from my Galaxy Nexus using XDA App

GringoMonkee said:
Heartbroken, I like it... Worse still I was testing out a Windows Phone. What a phone philanderer I am.
The drawer was nice and dry though I assure you.
How would I install USB drivers?
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
Assuming you're on a windows since you called it a PC..
Try and see if windows can install it for you.
Go to Start > Run > Enter "device installation" in the search > select "Change device installation settings" > Select "Install driver software from windows update if it's not found on my device"

Many have seen this type of problems, see http://forum.xda-developers.com/showthread.php?t=1427539
It's a hardware issue, but is fixable if you want to change the USB port yourself

Thanks.
Then post you link to seems to be about 'phantom' charging when no cable is connected. This is the opposite in a way - it won't charge when turned on at all.
New battery arrived today. No change. Device still trickle charges when powered off, but doesn't charge on mains power, and still will not recognise when plugged into an XP or Linux machine.
Gonna try a factory reset and will update.
Let me know of any ideas and or people with the same issue. I'm still of the opinion I haven't seen a thread with this same issue. Would be happy to be corrected.
Cheers

Well, a factory reset did nothing...
Stuck...

If you read the thread, many have had this exact problem, including myself. For me the phantom charging happened a while after it refused to charge.

What the actual ****...
I just tried what can only be described as the 'toothpick trick' : pushing down the connector nub inside the USB port on the phone et voila, now acting as normal.
I can only describe that as a really ****ty example of workmanship from Samsung.
And it would be after I reset the device as well.
Do you think this one's a definite hardware issue / defect? Seems a crazy thing to happen.

I had the same problem and search as I might, I could find no solution and had to send it in for repairs. The good news is, if you send it directly to Samsung (and dont go through your carrier), they were really fast about it and I had my phone back within a week

Lol, I was the one figuring out the toothpick trick I ordered the phone from clove.co.uk the first week it was released, and had this issue haunt me after a few weeks. As I'm in norway, I was not looking forward to sending it in, so tried to fix it myself. I tried "everything", including short circiut some pins in the plug on purpose, but what finally fixed it for me was to buy a OEM USB Charging board on ebay and replace it myself.
I know, really ****ty QA at Samsung.

Not looking forward to sitting and waiting to see if this is a recurring issue.
How much of a job is replacing the board on the phone?
Sent from my Galaxy Nexus using XDA App

Not that hard. The phone is easy to pick apart, and you can just "plug" in the new card with two simple connectors.

Turns out it is a recurring issue.
Is this the sort of thing that would be classed as due a replacement phone?
Sent from my Galaxy Nexus using XDA App

zoolake said:
I had the same problem and search as I might, I could find no solution and had to send it in for repairs. The good news is, if you send it directly to Samsung (and dont go through your carrier), they were really fast about it and I had my phone back within a week
Click to expand...
Click to collapse
I am having a very similar issue that I believe is hardware. Sometimes charges, sometimes won't. BUT it will not be recognized through USB on my PC so I can not flash stock images unroot and lock the bootloader back up. Where you completely stock and unrooted before you sent it in to samsung? I have to find some way to get it back to stock so I can get get this fixed...

chuckdz3 said:
I am having a very similar issue that I believe is hardware. Sometimes charges, sometimes won't. BUT it will not be recognized through USB on my PC so I can not flash stock images unroot and lock the bootloader back up. Where you completely stock and unrooted before you sent it in to samsung? I have to find some way to get it back to stock so I can get get this fixed...
Click to expand...
Click to collapse
Yes, I know there are many topics on this, but mine is a little different, and this appears to be the most current thread.
I have a galaxy nexus that I got from Google IO last summer. It has worked great until last week. It stopped taking a charge. When I would plug it in with the same plug I have used for months, it would show the lightning bolt, but not charge. I tried the toothpick thing but no luck and ended up breaking the usb port. So, I bought a replacment usb board off ebay and installed that. Now, when I plug the phone in, still no charge, but my computer does recognize the phone.
Then after the 4.2.2 update, I no longer see the lighting bolt, but it still does not charge. I have been charging the battery at night. I cut off the end of a usb cable and use electrical tape to tape the two stripped wires to the battery. But that only provides an 80% charge and doesnt last the whole day.
1) Not a usb port issue, but might be a motherboard issue?
2) Not a toothpick fix
3) Maybe a software issue?
4) Maybe time to buy the Nexus 4?

charging/usb port problem - can't un-root

I've seen this problem mentioned before, but no good fixes.
My phone won't charge while on, but will when off. Charging has always been a little buggy, but now seems stuck this way.
The problem seems to keep my phone from connecting to the computer - neither the mac android download program will recognize the phone, nor will it charge off the computer, nor will the wugfresh tool see it when plugged into my PC.
I rooted/unlocked using the wugfresh tool (kept the stock ROM) and figure I need to warranty replace the phone - but because the computer won't recognize it, I don't know how to un-root/re-lock it.
Question - 1. anybody know how to fix my usb charging/recognition problem? 2. assuming not, is there a way to un-root/re-lock the phone without needing to plug the phone into a computer?
Thanks very much!

Does it charge with the phone on from AC? And when it's plugged up to your mac, does it have the thing in the notification bar saying its connected?
It's possible you have a bad cable, just to eliminate the easy fix first. It should charge fine with any mini USB charger.
If you can get it to charge from AC, I'd try a different computer if possible or if not maybe a re-install of the drivers.
Next, as maybe a last ditch effort, it's possible the ROM got corrupted, though I'm not sure how likely that would be. I'm sure you can get the stock ROM to flash in Clockworkmod but the only way to re-lock the bootloader that I know of requires a PC.
Maybe someone else can chime in weather or not Samsung actually cares if you're unlocked when it comes to a warranty for a hardware problem. Also, what carrier do you have? They may just give you a new phone themselves and again, maybe someone can tell you if they actually look at whether you've modded your phone.

Thanks for the reply.
Yes, when it's hooked up to an AC adapter and the phone is ON, I get no charging. When the phone is on and hooked up to a computer (both PC and mac), I get no charging. No upper right hand corner battery indicator change.
In fact, when the phone is off and hooked up to AC power, it seems to be hit-and-miss as to whether or not it actually charges.
Plugged into a computer, I get nothing - it doesn't register a device is attached at all.
I think that's a great question - if you return an un-locked phone, do they definitely get mad at you? I wonder if that's been asked in the forums before...maybe I'll make a different thread?

Also, from clockworkmod, how can I flash the original rom, as you suggested?
I've already factory re-set the phone and even flashed a different ROM just to see what would happen - and it didn't fix the charging issue.

Try this https://play.google.com/store/apps/details?id=eu.chainfire.mobileodin.pro
Sent from my Galaxy Nexus using xda premium

I literally had this exact issue over the weekend where it would charge when powered off but then the USB would completely die when the phone was turned on. All after using my incar charger. It seems the port inside the phone got bent so that the board inside was almost touching the bottom of the phone. If held flat on your palm...
I fixed it by bending the board back up with a knife so its dead in the middle of the port. No problems charging now.

this exact problem has been an issue for me as well, contacted Samsung and told them i bought it second hand and they issued a rma and sent me a ups label t send it in. This is my first phone that broke before I even had a chance to root it. I was pissed at Htc so decided to try something new. Going back to my T-Bolt for a while now.
My phone charges sometimes, others it doesnt. Sometimes the "Nintendo blow" works, other times it requires force. Eventually I can always get it to charge, but it can take a half hour of playing with it. I have multiple cables, original Samsung batteries, and lots of experience inside phones, and have never had an issue that I couldnt FULLY determine was hardware or software. Samsung claims they have never seen this issue. lol. Obviously they dont visit the forums

cymru said:
I literally had this exact issue over the weekend where it would charge when powered off but then the USB would completely die when the phone was turned on. All after using my incar charger. It seems the port inside the phone got bent so that the board inside was almost touching the bottom of the phone. If held flat on your palm...
I fixed it by bending the board back up with a knife so its dead in the middle of the port. No problems charging now.
Click to expand...
Click to collapse
great idea - i was using my car charger this weekend. i'll give it a shot.
update - i bent the little board up off the bottom, and now i can't fit the charger in it. uhoh.

This is becoming a bigger and bigger issue. Please star and/or comment on this issue: http://code.google.com/p/android/issues/detail?id=23789

I sent my galaxy to Samsung 2 weeks ago, it is due to arrive back today. They paid postage each way and the invoice says they replaced a component (no detail) and updated software and prl. I was already on the current release so not sure what to expect. But it is good to know they are taking care of us.

Galaxy Nexus giving me battery/charging problems...

A few days ago, my Nexus stopped charging while turned on.
I noticed that it still charged when the phone was off. So, I started turning it off @ night to charge it.
Well now... for some reason when I plug the phone in while it's off, it shows me the charging animation (the battery filling up), but then all of a sudden it shows a battery with a bolt running through it (im assuming this means fully charged) and then it does the animation again.
Wtf is happening??
thanks guys.

bump..

iArtisan said:
bump..
Click to expand...
Click to collapse
It sounds like the 'Ghost charging' issue. See if the small pin in the Micro USB port is touching something. Look very carefully! If so, try to bend that pin slightly up just so it doesn't touch the surrounding.
If that doesn't help. Buy a replacement port for like 6 USD. Replacing it will take you at most 15 minutes including re-assembly.

Some people reported problems with using LED controller apps like light flow and flashlight apps, try uninstalling any that you may have and see if the problem is resolved, if not then what the guy above suggested seems to be the only solution
Sent from my Galaxy Nexus using xda premium

I had something like that before ... my mobile shows it is charging while not plugged in, sometimes it wakes up and sleeps many times repeatedly as if I'm plugging but and unplugging it again ... finally I found people talking about the problem and the solution was using the original cable for charging ... if not solved yet you can do what I did, clean the micro USB port using a small brush and the last thing you can do if not solved , you can left up the micro USB pin using a thing clip, and that's what solved the problem for me ..
Sent from my Galaxy Nexus using xda app-developers app

hmm... any more input from you guys?
I did a restore so there shouldn't be any apps keeping it from charging now.

tuk1maar said:
It sounds like the 'Ghost charging' issue. See if the small pin in the Micro USB port is touching something. Look very carefully! If so, try to bend that pin slightly up just so it doesn't touch the surrounding.
If that doesn't help. Buy a replacement port for like 6 USD. Replacing it will take you at most 15 minutes including re-assembly.
Click to expand...
Click to collapse
the small pin in the phone? The one that's horizontal? how would I bend it up?

iArtisan said:
the small pin in the phone? The one that's horizontal? how would I bend it up?
Click to expand...
Click to collapse
only bend it up if you can see it touches the surrounding. Bend it up with the smallest thing you can find that fits in there. BE CAREFULL! do not use force. You need to use little power to lift it up. I myself never had this issue but I did read alot posts related to this. And lifting the horizontal pin up solved it for most of the people that sufferd from this issue.
One question: Did you ever use any charger except for the standard Galaxy Nexus charger? (Including car chargers and such)

tuk1maar said:
only bend it up if you can see it touches the surrounding. Bend it up with the smallest thing you can find that fits in there. BE CAREFULL! do not use force. You need to use little power to lift it up. I myself never had this issue but I did read alot posts related to this. And lifting the horizontal pin up solved it for most of the people that sufferd from this issue.
One question: Did you ever use any charger except for the standard Galaxy Nexus charger? (Including car chargers and such)
Click to expand...
Click to collapse
no. never. If I mess up, will replacing the charging port resolve the issue?

Bending the pin up resolve the issue for me. The problem returns back after a charge and unplug perhaps pushing the pin back into wrong position. I uninstalled lightflow app, it had no effect.
I have ordered the replacement usb port, middle cover(the usb socket seems worn out). I will post an update

sitaramp said:
Bending the pin up resolve the issue for me. The problem returns back after a charge and unplug perhaps pushing the pin back into wrong position. I uninstalled lightflow app, it had no effect.
I have ordered the replacement usb port, middle cover(the usb socket seems worn out). I will post an update
Click to expand...
Click to collapse
please do.

I think I have the same problem. I tried bending the pin, removing LED apps, various combinations of unplugging, turning off etc., and I tried changing the USB PCB in the phone to no avail. I even tried different batteries. I have absolutely no clue what the issue is. This is doing my nut in.

ibm9001 said:
I think I have the same problem. I tried bending the pin, removing LED apps, various combinations of unplugging, turning off etc., and I tried changing the USB PCB in the phone to no avail. I even tried different batteries. I have absolutely no clue what the issue is. This is doing my nut in.
Click to expand...
Click to collapse
If you have rooted your phone.. wiping battery stats in recovery mode did the trick for me.. It happened to me atleast 2-3 times.. It's not a permanent solution but just a temporary measure..Im not sure what goes on. I've only had my Gnexus for 1 month and its happened like 3 times. Really3 sucks. Anyone know if it is software related? perhaps unrooting would do the trick??

It could also be a hardware problem, it's been reported before. Following is a guide to replace the USB and charging logic board on a Galaxy Nexus (the guide is for the CDMA version, but it's very similar to a GSM version): iFixit Guide You can order the parts for the GSM version here: Replacement part.
I just ordered one because my phone keeps doing the same stupid things: sometimes it charges, sometimes it doesn't, USB connection is completely erratic and it strangely enough always shows the loading icon when it's off and connected, but doesn't actually charge the battery. Tried wiping, reflashing, restoring, switching on and off, wiggling the cable, taking another cable, readjusting the position of the USB pins - to no avail. Now I'm trying replacing the board. Wish me luck!

zyrill said:
It could also be a hardware problem, it's been reported before. Following is a guide to replace the USB and charging logic board on a Galaxy Nexus (the guide is for the CDMA version, but it's very similar to a GSM version): iFixit Guide You can order the parts for the GSM version here: Replacement part.
I just ordered one because my phone keeps doing the same stupid things: sometimes it charges, sometimes it doesn't, USB connection is completely erratic and it strangely enough always shows the loading icon when it's off and connected, but doesn't actually charge the battery. Tried wiping, reflashing, restoring, switching on and off, wiggling the cable, taking another cable, readjusting the position of the USB pins - to no avail. Now I'm trying replacing the board. Wish me luck!
Click to expand...
Click to collapse
I wish you luck… but I tried that and it didn't help, so don't get your hopes too high.
Sent from my Galaxy Nexus using xda app-developers app

My Nexus is also having the same problem. Bending the USB pins does the trick but it keep coming back.
Last night I had the same charging problem, so, I applied the same trick, but this time, it created a different problem. When I plugged the phone into my computer, it can be charged but is not recognized by Windows. Also, the headphone plug is acting funny. When a headphone is plugged, it is not detected and music still coming from the speaker. All these happened after I bent the USB pins, might be I applied too much force or might be the pins give up itself this time.
Anyhow, just order a replacement part and hope it will resolve all these problems.

I have fixed the mystery headphone problem, It was caused by the Wechat app that I have recently installed. Once I have unistalled that app, the headphone works properly.
Just waiting for the new charging port USB flex cable to resovled the "USB Deivce Not Recognized" problem.

I have a small question. Can I turn off the display backlight when the charger is connected ?How? That would be great temporary solution

I have read in other forums from people that have replaced the USB port with no results.
What I read and worked for me was to lift the small "tongue" inside the USB port towards the screen. As soon as I did it the charging animation disappear. This, of course, is most probably just a temporary fix and the problem will come back eventually. But at least it's stopped driving me crazy for a moment.
I tried plugging the charger and it charges normally, but it looks like the charger pushes the tongue back down so the "charging when not charging" problem re appeared. I pushed the tongue back up and "fixed" it again.
With this in mind one would think that changing the port would fix the problems but people have reported the opposite :/
BTW, I am using the original charger, although, I have used many other chargers with this phone

Hi,
I had the same problem of ghost charging, it started with phone not charging when connected to charger and then randomly showing charging...
Now discovered it causes vbus_tuna_otg wake lock in Bette battery stats and high system usage in setting> battery, basically not letting the phone go to deep sleep, causing battery drain.
Any way to fix this. ?
Sent from my Galaxy Nexus using Tapatalk 2

[Q] Charging goes on and off, Software to blame?

Read on... before you just see the post and start flaming.
Been having a helluva trouble with my Galaxy Note II since a month now.
It all started a day in April when I was on a weekend break and my charger just stopped working. Not the charger, but the charger port. I even tried a few other chargers and none of them worked, whereas my charger worked on other phones.
So after the weekend without a phone I come back home and read some posts on XDA about moisture in the USB port. I blow dry the port with the hair dryer and things start working again. After a couple of days of flawless working, again the problem comes up. But it is nothing that a few 'frustrating' 20 minutes of fidgeting will not solve and so goes life.
There have been a few days where it has gotten so annoying that the phone simply wont charge no matter what I do and which angle I place the phone (yoga for phones, anyone?). The phone has even switched off completely at times. Yesterday was one of those days when it simply wouldn't charge.
So again I spend a lot of time on XDA and Google and what makes consensus is that there is moisture in the USB port, or there is something wrong (loose connection) with the USB port and it needs repair.
Few facts before we get to that, and my point about this being a software problem.
1. The charger, when it works, works flawlessly irrespective of whether it is on the table or hanging by the charger from the power outlet. I expect that in case there is a loose connection, the position becomes very delicate.
2. The charger, when it works after moving the wire around for a while, keeps disconnecting occasionally even though it has been placed on a stable table surface and no one is disturbing the table. After some seconds, it connects back automatically and begins charging.
2. The phone works without any problem whatsoever when I plug it into the Samsung car charger - never once do I remember it not working
Now here are my findings from yesterday after I almost broke the phone in frustration.
1. On a whim, I decided to do a factory reset of my device. After fidgeting with the phone for 4-5 hours and it not charging, it magically started charging after the factory reset.
2. After the reset and a 1 hour charge, I updated all the default software on the phone - including 1 samsung update, 1 allshare update, and 1 push service update. Within a few minutes of this update, the charger started showing the 'loose connection' problems again. I also noticed that at times the phone screen would switch on for no reason - for only 2-3 seconds.
3. Again I reset the phone, and force stopped some samsung services and disabled as many samsung services as I could and I could notice consistent charging.
I subsequently installed some apps (not going full out as I want to observe the behaviour) and occasionally the charging stops. I then go into the application manager and shut down some samsung services and more often than not the charging starts working.
After all this circus, I believe there is something wrong with the Samsung services, the phone device drivers, or the MTP service. It does something when it detects a cable being inserted and causes a malfunction of the phone. This is what it looks like to me.
In fact the same problem happens when I plug in the phone to the PC too. The connection keeps breaking and the phone is just not usable from the PC. However the interesting thing is that when the USB / MTP breaks, the charge is still working and the orange light is glowing.
So, finally the XDA relevant question. Can you guys help me find out if it really is a software problem or just some strange co-incidence? Are there any traces that I can pull out to see which app/service is causing the problem? There are many apps/services that I would like to disable, but they are greyed out - is there anything that I can do about them?
Mind you that my phone is not rooted - so all the usually available apps might not work for me. I use the phone as a corporate device and I can't violate rules by rooting the phone.
Any tips, suggestions, ideas, flames?

Hi I'm having the exact same symptoms as you I wondering if you got to the bottom of the problem? Many thanks
Sent from my GT-N7105 using xda premium

My wife has same problem with her note 2 since yesterday. I'll test and share the result.
Sent from my GT-N7100 using XDA Premium HD app

Are you sure it's not the cable? Because many stock cables tend to be crappy, just try another one if you haven't. It doesn't have to be just loose connection.
Works here fine without issues, so doubt it's software. I rooted mine almost immediately, so can't say much about that though.

Ive tried 3 different cables and every time I plug one in s voice launches lol
Sent from my GT-N7105 using xda premium

Could be a problem with newer Samsung phones and their construction. I have a friend who has a Galaxy S3 (not Note 2) who's gone through FOUR phones so far -- all of them with the same problem of the charging port dying after a while. T-Mobile's insurance company is starting to give him dirty looks, poor guy ...
He gets intermittent charging before the phone stops charging completely. Now his phone is hooked up to the charger constantly while he's at home because of battery issues, so it's possible he's putting excessive strain on the charging port. My thinking is that it's a hardware issue rather than software, but who knows with these things.
mudge

my friend's note 2 having quite similar problem, every time plug in the cable, the phone start charging after some minutes. not the problem of cable, i tested the cable and charger with my phone. Plan to send it to service center.
Sent from my GT-N7100 using xda app-developers app

Exact same problem for N7100 (international version)
I have been facing the exact problem described above. The service center has blamed water logging to be the issue. But seriously doubt it since the port seems to be working fine when it really functions. Also i noticed that when i restart my phone few times it starts to work fine(without me touching the charger cable or the charger itself). I guess its a lot to do with the software than the hardware

note 2 Gt-n7105 bootloops, with charger doesnt boot loop
Hi,
My note 2 seems to work perfectly fine when i connect my charger. But when I disconnect the charger when its full charge it turns off.
When I turn the phone on without the charger it comes on the screen where it shows the "samsung galaxy note 2 gt-n7105" its begins to boot loop.
Can someone please give me some solutions.

Has anyone ever solve this? I have the same on my S4....

I too have the exact problem of phone getting connected and then disconnected automatically in few minutes.

I fixed mine with the same issue

Power usage
Hi,
I first saw this when I was using my sat nav app in the car, I turned off the Performance optimised when plugged in option in favour of a lower power option and the problem went away. As I get more applications on my phone I see this more and more.
Could this be the power usage of the phone? The charge will supply 500ma, if the phone is already using a good portion of that the battery will not charge, so the phone shows the charge intermittently as the phone uses slightly more and slightly less power when the cpu, etc wakes and sleeps. More apps running uses more time on the cpu so more power. And of course as the battery gets older this would display itself more.
Just an idea based on what I've seen...

My Note 5 just started doing this, and only on the car charger using the Adaptive Fast Charge port. Charges for 2 seconds, off for 2 seconds, charges for 2 seconds. Using the normal port it charges fine, just slower. I have the Adaptive Fast Charge adapter at home and in the car, it works fine at home.

usb A3 usb issues
for mine it is intermittently not being recognised in file manager and also charging and then not charging round and round making beeping noises. This started when I dropped it partially in a bowl of oxtail soup. At the time it wouldn't recognise any cable at all. After I cleaned it with a cotton wool bud it was working again for ages but every now and then it wouldn't be explorable in windows. Now its acting up again, very difficult to get it to detect in windows, it starts charging when I plug in the cable but not in file explorer.
It's a real pain because its a samsung a3 which is difficult to open. I think really I will have to get it repaired - opened up and cleaned inside properly or have the usb port replaced.
I've watched many videos about mtp drivers and cleaning and bending the usb port a bit etc etc for many of you I think cleaning the port and/or bending the usb tab a bit would help, good luck.

Stop posting your damn problems so some one can answer it. Jesus look at the posts and see if there is an answer.l cuz you asking makes no difference because u have to scroll to the bottom to see an answer any ways. So just w8. Also ya it's software thing.... Samsung kinda sucks but what the hay I love them anyway even tho thay, including the expencive ones, are crap

[Q] Nexus 7 will not turn on after repair

Hi, I'm wondering if anyone with experience repairing a Nexus 7 2013 could help with my issue. The charging port had loosened to the point of being useless, so I bought a replacement board (straight from Asus). I replaced the board, turned it on and it worked 100%. I left it charging, and a few hours later turned it back on, and now the touchscreen wasn't working. I believe that one of the flex cables which plug into this board connects the touchscreen, so in theory I could get that working. But when I went to tackle it a few days later, the tablet won't turn on. It appears to he completely dead - there's no response from my laptop when I try to connect it via USB (ie no device is detected). I haven't touched anything beyond the bottom board (although I did reseat the display cable at one point thinking it could be a display issue). I have tried bending the charging port back into shape on the original board and using that - no change to my issue. I am at a loss, and I don't want to disassemble the rest of the tablet for no reason - any ideas?

yosifcuervo said:
Hi, I'm wondering if anyone with experience repairing a Nexus 7 2013 could help with my issue. The charging port had loosened to the point of being useless, so I bought a replacement board (straight from Asus). I replaced the board, turned it on and it worked 100%. I left it charging, and a few hours later turned it back on, and now the touchscreen wasn't working. I believe that one of the flex cables which plug into this board connects the touchscreen, so in theory I could get that working. But when I went to tackle it a few days later, the tablet won't turn on. It appears to he completely dead - there's no response from my laptop when I try to connect it via USB (ie no device is detected). I haven't touched anything beyond the bottom board (although I did reseat the display cable at one point thinking it could be a display issue). I have tried bending the charging port back into shape on the original board and using that - no change to my issue. I am at a loss, and I don't want to disassemble the rest of the tablet for no reason - any ideas?
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It could be something as simple as a discharged battery. Let's take one step at a time. When you use the Qi to charge it, does anything show on the screen? Some people have reported the tab to be stuck at the Google logo after letting it discharge completely. Being totally dead is different. The tab uses current from the battery only, so if it's at 0%, you might need to wait for 1/2 hour or so before you can boot it up.