I have a problem, and i need help solving it - Nexus 7 Q&A, Help & Troubleshooting

Hello!
3 days ago i bricked my Nexus 7, it would only go in APX mode, then i found a cheap one online and ordered it, it worked but it was banged up, the wi-fi antenna was also broken, but it worked, i then decided to switch the motherboards, becasuse my nexus was in perfect condition. Now i am stuck, wherever i put the "new" motherboard it does not boot, i used the same battery it had and everything, except the usb port, because it was preety banged up on the "new" one... but now it won't work even if i put it back in the old config...so now i need your help, i also saw that the screens are different one of them is Hydis (mine) and the "new" one is HUNGHWA, is that the problem? did i fry it or something?
I can also post pictures if you it woudl help...thank you so much
EDIT: Left it charhing all night and it worked, but the battery would not charge, so i switched out the battery for my own, and now i am trying again

outlawman007 said:
Hello!
3 days ago i bricked my Nexus 7, it would only go in APX mode, then i found a cheap one online and ordered it, it worked but it was banged up, the wi-fi antenna was also broken, but it worked, i then decided to switch the motherboards, becasuse my nexus was in perfect condition. Now i am stuck, wherever i put the "new" motherboard it does not boot, i used the same battery it had and everything, except the usb port, because it was preety banged up on the "new" one... but now it won't work even if i put it back in the old config...so now i need your help, i also saw that the screens are different one of them is Hydis (mine) and the "new" one is HUNGHWA, is that the problem? did i fry it or something?
I can also post pictures if you it woudl help...thank you so much
EDIT: Left it charhing all night and it worked, but the battery would not charge, so i switched out the battery for my own, and now i am trying again
Click to expand...
Click to collapse
mods can delete this thread, the tablet has woken up, i left it charging for one day and now it works

Related

No charge light

Everything was absolutely fine earlier this afternoon (then the phone got a bit hot while riding in my car) and now, It is not being recognized by active sync or any power sources. The amber light doesn't light. It has happened before but then "fixed" itself. Anyone have any experience with this? This has happened both with the original ROM and the AP rom I am running, so I don't know that it is a software based problem. Any ideas? (Yes, I have it turned off, I have pulled the battery out as well, the USB feels no different than it did before).
-Will
Are you under warranty? Since this sounds like a recurring hardware issue I'd get it replaced. I've never had this issue, even when I left it on the dash of my car for an hour this summer, directly in the sun (by accident). The screen protector bubbled up and it was almost too hot to hold, but it started right up and hasn't had any problems.
Have you tried a hard reset?
Definitely no warranty (this is one that I did the screen replacement on and worked flawlessly for over a week with no problems. It did this before the screen was broken as well.) I noticed that it does feel a bit loose (the USB) so I am opening it up and going to check the solders. I know I'm crazy for doing this but it's out of warranty and it is already broken, so.... why not? And yes, I've done a hard reset and it still is giving me fits.
-Will
well....
All solder joints seem good, no inordinate resistance, nothing out of the ordinary... the problem is further up the stream I am guessing.... so right now, it looks like I'm down my Advantage. May just end up selling it off for parts and getting a Diamond or some such for a replacement (can't afford another X75xx series phone right now...)... Brand new screen on it, and everything worked fine for a week but I think something in my car fried it... because my S621 died the same way recently... and my Asus PND fried as well....and all of them had one common thread. Being plugged in to my car for recharging purposes most of the time.
-Will
hooty said:
All solder joints seem good, no inordinate resistance, nothing out of the ordinary... the problem is further up the stream I am guessing.... so right now, it looks like I'm down my Advantage. May just end up selling it off for parts and getting a Diamond or some such for a replacement (can't afford another X75xx series phone right now...)... Brand new screen on it, and everything worked fine for a week but I think something in my car fried it... because my S621 died the same way recently... and my Asus PND fried as well....and all of them had one common thread. Being plugged in to my car for recharging purposes most of the time.
-Will
Click to expand...
Click to collapse
I sent you a PM. interested in it for parts (I also posted a thread about looking for parts)

Help Please Hermes won't turn on.

ok so what happened was is that i dropped my phone although when i looked at it it seemed fine, not even a scratch, calling worked...but a couple of hours later i got no signal in this place although my dad had signal and we're on the same network and we have the same phone too. I received signal as soon as I left the place.
And here is where my problem comes, everything was working fine and i had my phone in my pocket for the whole day cause i was at school and after school i decided to take a look at the time, but my phone was off and wouldn't turn on, but i expected that it ran out of battery.
I got home and tried charging it, but nothing happened, so i decided to use my dad's battery (fully charged) it still wouldn't turn on, i've tried soft/hard resets still nothing.
can it be the hardware? what is broken? it won't turn on/won't charge/no led lights/no red led when charging without battery/ nothing so what is wrong please help.
Probably battery contacts... If you can see a crack, you might be able to resolder them and fix however the Hermes uses a multi layered board and if the break is there then you need a new mainboard, in a few words, your Hermes is toast....
is there any possible fix? if the board is broken, where can i get a replacement and instruction on how to fix? thanks :]
Find an old Hermes on ebay. If the screen doesn't work or something, DON'T get one with "No GSM", then you should be able to replace the Mainboard.
Find the HTC Service Manual here - http://michael-channon.spaces.live.com/PersonalSpace.aspx?_c02_owner=1
You need a size 6 torque key and a small flatbladed screwdriver to get the Mainboard. Pretty easy, I've taken my Hermes apart more times than I can count.
Cheers...
thanks for the help so far :]
but is there a site that just sells the part? cause i really don't want to end up buying a mainboard on ebay that ends up not working too.

Possibly trashed my G1

Hey.
I'm wondering if someone can lend me a hand here. I was rock climbing last weekend, left my phone in my jacket pocket, and I suspect someone may have stepped on / thrown my jacket.
In any case... it's not working right now. It doesn't start up, and there's no light when I plug it into the USB/wall chargers. Any hints on whether this thing is totally trashed? The phone was in its case the whole time, and its exterior looks completely undamaged as far as I can tell, with no scratches, etc. Another possibility is that it got rained on, but I highly doubt that the water penetrated the outside of the phone (especially given that it was in the case the whole time).
If anyone can help me getting my phone working again I would be eternally grateful.
you're kidding me,right? your phone doesn't start,no led comes on when you plug it in,and you want someone to tell you if it's trashed? did you check that the battery is properly seated?
hey whats going on? Heres what I suggest, take it to the tmobile store and tell them that the phone was charging and it started acting funky so you turned it off, and than it never came back on. From there they will switch out your battery, than if that dosent work they will just give you a new phone right there in the store. Long as no water damage which i dought it does. Just do that and you will be ok, I have done that many of times lol.
>did you check that the battery is properly seated?
Yes. I also wiped the contacts on the battery and the device.
mikesx4911 said:
hey whats going on? Heres what I suggest, take it to the tmobile store and tell them that the phone was charging and it started acting funky so you turned it off, and than it never came back on. From there they will switch out your battery, than if that dosent work they will just give you a new phone right there in the store. Long as no water damage which i dought it does. Just do that and you will be ok, I have done that many of times lol.
Click to expand...
Click to collapse
Unfortunately it isn't quite that simple for me. I live in Canada; I purchased this phone several months ago basically new off eBay (it was used for a couple of weeks). Funnily enough, my iPod which was "naked" in the same pocket as my phone is also undamaged and continues to function normally. Are there any tests I can do to better determine the location of the problem?
sorrofix said:
Unfortunately it isn't quite that simple for me. I live in Canada; I purchased this phone several months ago basically new off eBay (it was used for a couple of weeks). Funnily enough, my iPod which was "naked" in the same pocket as my phone is also undamaged and continues to function normally. Are there any tests I can do to better determine the location of the problem?
Click to expand...
Click to collapse
You're gonna need some technical know how. Open the phone and check the mobo for any disconnected cable and/or water damage. There is really nothing you can do that you haven't already done from the outside of the phone. If possible, find a local repair shop and have them take a look at it.
Update: so basically I took out the battery, waited a day or so, put it back in, and all the buttons lit up on the phone (but the LCD remained blank and so did the charging light).
Took the battery back out, waited another day, put it back in, and the phone suddenly turned on and has been working fine since. Anyway, thank you everyone for your help.

N7 screen issue + not recognized by PC

So I have an issue with a 2012 N7, warranty is long gone. I've tried all suggestions from billykxda's thread, but no luck thus far. I've also tried Google's official page on the topic as well.
I've left the device charging for many consecutive hours, both via AC power and USB, and I suspect my issue resides with the LCD screen. Also tried a hard battery pull. It's also important to note that I haven't undertaken any mods on the device at all, i.e. the bootloader is still locked and USB debugging is not enabled yet.
When I plug the device into my PC the Win7 driver notification bubble pops up, usually reporting either an Unknown Device or an "APX drivers not installed" message. I'm unable to get it to boot into Fastboot, Recovery, or Android OS. Plugging/unplugging the device via USB yields these driver messages over and over again, along with the Win7 sound notification, so the device isn't totally dead, but no amount of button combinations or 30-60+ second button holds are getting any response.
Has anyone else experienced these issues before? Do you think my device is totally dead?
AvidPhisherman said:
Has anyone else experienced these issues before?
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Click to collapse
Yes; I am also experiencing similar issues. Unfortunately, I have not reached a solution. I just replaced a broken screen for a friend. Once I got the screen in, I tried turning it on but didn't see anything happen. I began to research and thought I had the dead battery issue that most people get when leaving it unplugged for an extended period of time. I plugged it in using the wall adapter for a few hours, used the power+volume buttons and still didn't get any response. Finally, I decided to charge it with my PC. The PC recognized something was plugged in, installed drivers, and now I have a Nexus 7 in my connected devices list. While connected to my PC, I hold power+volume down and hear the USB disconnect, reconnect, and have an unrecognizable device attached. This leads me to believe that the Nexus 7 is working properly and the screen is not working. I have taken the entire device apart to re-seat all connections 3 different times and still cannot get it to work. I hope someone can shed some light on our issues!
Edit: I forgot to mention, I also tested the battery with a digital multimeter. It reads approximately 3.79 volts DC. I thought it may be important to state this in case the issue is battery related. I'm not certain what the correct value should be for it to work properly.
I am currently trying to diagnose this problem. Yesterday, I hopped on Craigslist and bought a working Nexus 7 for 50$. I am currently taking it apart to rob parts from it and figure out where the problem is. So far I have tested the battery. The battery reads approximately 3.78 volts DC so I can probably rule this out as my problem.
Also, I noticed something strange yesterday. I took the broken Nexus with me when I went to meet up with the man selling the used/working Nexus. While I was outside in very bright sunlight, I pushed the power button on the broken Nexus. I noticed that I could actually see the screen doing something. It was all fuzzy and had lines running every where, but you could in fact see it doing something. I think the replacement screen I received is bad, but I won't know until I start swapping parts.
AvidPhisherman, for now maybe try taking your Nexus out in very bright sunlight and see if you can see the screen do anything when you press the power button. Also, I'm not trying to hijack the thread. It seems that we have very similar issues. I hope to find something that fixes both of our problems.
Success.... kinda. I tried combining the broken Nexus 7 motherboard with the working Nexus 7 screen but it wouldn't fit since one is the 3G model, and the other is the Wifi only model. Next, I put everything back together on the broken N7, but this time I used the LCD ribbon cable from the good N7. Success!!! It powered up, and I can see the screen. My problem now, is that the screen is mostly unresponsive and acts like you are touching it in random spots, when you're not touching it at all. I'm taking it apart to re-seat the connections... again.
__redfox__ said:
Success.... kinda. I tried combining the broken Nexus 7 motherboard with the working Nexus 7 screen but it wouldn't fit since one is the 3G model, and the other is the Wifi only model. Next, I put everything back together on the broken N7, but this time I used the LCD ribbon cable from the good N7. Success!!! It powered up, and I can see the screen. My problem now, is that the screen is mostly unresponsive and acts like you are touching it in random spots, when you're not touching it at all. I'm taking it apart to re-seat the connections... again.
Click to expand...
Click to collapse
Hey redfox thanks for taking in interest in this! You're not hijacking the thread, your posts are very helpful. Good to know I'm not the only one experiencing these issues.
I'm just a hobbyist with an interest in fixing things, although I don't have much experience with DIY fixing. I didn't have a chance to try turning the screen on under direct sunlight, but yesterday I took both my non-working Nexus 7s (the first one I mentioned in my OP, the second one just has a bad/hollowed out USB port) in to a repair shop for a free diagnosis. I'm actually a business user, my company owns the tablets but I'm responsible for maintenance/tech troubleshooting.
Please keep me posted with updates as to how your progress is going. I'll post again once I get a report from the repair shop re: my issues.
Hi,
I have been having the same problem,
I bought my wife a used Nexus 7 and it worked just fine for almost a year then all of the sudden the screen would not function
there would be lines going through it but it remain dark.
thank you for researching the matter i will try to buy the part online and see if i can get it to work now!
if i understand it correctly there is no need for a new mother board but just a new LCD ribbon cable?
godnessy said:
Hi,
I have been having the same problem,
I bought my wife a used Nexus 7 and it worked just fine for almost a year then all of the sudden the screen would not function
there would be lines going through it but it remain dark.
thank you for researching the matter i will try to buy the part online and see if i can get it to work now!
if i understand it correctly there is no need for a new mother board but just a new LCD ribbon cable?
Click to expand...
Click to collapse
I cannot guarantee that it will fix your screen, but it is possible. When I had this one out in the sun, it did the same thing. The screen was super dark, and I could see crazy lines. Hopefully a new ribbon/cable will fix your problem. They are only a few dollars on Amazon.com
godnessy said:
Hi,
I have been having the same problem,
I bought my wife a used Nexus 7 and it worked just fine for almost a year then all of the sudden the screen would not function
there would be lines going through it but it remain dark.
thank you for researching the matter i will try to buy the part online and see if i can get it to work now!
if i understand it correctly there is no need for a new mother board but just a new LCD ribbon cable?
Click to expand...
Click to collapse
__redfox__ said:
I cannot guarantee that it will fix your screen, but it is possible. When I had this one out in the sun, it did the same thing. The screen was super dark, and I could see crazy lines. Hopefully a new ribbon/cable will fix your problem. They are only a few dollars on Amazon.com
Click to expand...
Click to collapse
Hello fellow users! Quick update, I finally heard back from the repair shop.
Bad news - they tried swapping out the screen, then the battery, USB charging port, display cables, etc. etc. and nothing worked. Their diagnosis is that the tablet has a fried motherboard, and they're unable to repair and/or replace it
Good news - it cost me nothing to receive this diagnosis
Hopefully the outlook is not so grim for your respective N7s. Just wanted to post an update as to what I learned from this whole experience.
Hi guys, Reporting in.
Toke a while but i got the part AND found the stupid device!
After ALOT of fiddling, taking apart and putting back again i found out that the problem was the battery!
it looks like it was on its last leg and that caused all the strange screen stuff.
I dont have another battery to replace it so instead i hooked it up straight to a USB cable and into the socket and it works just fine
thanks for the tips and hopefully this helps someone else!

Seeking help extracting phone contacts from a broken phone.

Alright, long story short... I've been a user of a D-802 for the last 4 years. I was unlucky enough for the phone to be dropped from 2nd floor at work (don't ask how), the panel housing the screen is bent in right upper corner, which ultimately means this; I've fixed the screen two times, for it to be broken in less than half a month. Even more so, I ordered a new screen a week ago and it broke because of the bent frame 10 minutes after fitting the screen, as in, simply putting on the rear plastic cover, which broke the screen and the flex cable. Took it over to a repair store, they told me the phone has a broken cable on the screen and a new screen costs 90 EUR (not really worth considering how old the phone is.) and the motherboard was damp, too.
Now what I've got is a glorified brick. It turns on, the screen is black/non responsive to touch and it's stuck in file transfer or charging mode. Not really a problem, as I was able to retrieve all the photos from the phone through USB connection, however, what I'm really after are the phone contacts in there. We're talking about 3+ year old contacts that have a monumental value to me and I'd see gladly see them backed up.
Now, the reason I hadn't backed the phone is because it's rooted, obviously.
Out of ideas so far, will be eternally grateful to anyone with suggestions.
Lyricistlv said:
Out of ideas so far, will be eternally grateful to anyone with suggestions.
Click to expand...
Click to collapse
I think the easiest way is the same way you rescued your photos from internal storage. Search the system partition for database files like contacts.db or other *.db-files. One should contain your contacts.
Good luck! :good:
Thanks, but no luck on that behalf. Already tried that, also didn't find much luck with adb or other software, as it all requests USB debugging to be turned on.

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