Two dud Nexus 7 2012's, possible issue? Logic board replacement? - Nexus 7 Q&A, Help & Troubleshooting

Hey guys,
Just at my local office store and they were selling defective 2012 Nexus 7's for 5 bucks a pop! Great, picked me up two 32gb models, opened them up and surely enough, nothing.
Plugged them into a computer, the first one did nothing, second one's screen flashed then nothing.
Was thinking that it could be defective logic boards and I could get two for $25 each (http://www.ebay.com.au/itm/GOOGLE-N...erboard_CPU_Combos&hash=item5d4adfae9a&_uhb=1), just wanted to make sure that it's not something else and I dont waste more money?
Any insight would be great!
Thanks, Danz207
UPDATE: I read to hold Vol up/down and power button and the same time and one of them started charging, so I guess it works, just the other one thats dead now

UPDATE: Just a dead battery, they both work fine! Just bought a cheap battery off of eBay, you think that it would at least turn on and alert you of a battery problem?

Related

My Xoom learned a new trick...

...Play dead.
We all know how brilliant a design the charge cord adapter is, I myself am on to my third one in almost two years. Well, the tablet stopped charging today and no matter which wall outlet I used or how much I wiggled the lead I could not make the light come on. Seeing that my Verizon contract is all but done at the end of this month and rather than buy another charge cord I decided to buy a new tab. I just picked up the new Asus Transformer Infinity, not too bad so far. Anyways, about 20 minutes after getting home with neither tablet charged to a useable level, the power goes out for a couple hours- just my luck too. When the power came back on suddenly the light on the Xoom came on. I hadn't touched it since I gave up on trying to get it to charge. Now here I am with two tablets and a $500 hole in my pocket. I know I was bound to get a new one eventually so I'm going to hang on to it but I never saw it happening like this.
Has anyone else had any issues regarding their chargers? Or anything unusual occur in general? I'm sure I'm not alone.
Ouch I would hate to folk out another $500 dollars for a new tablet even though my old one still works. I don't use my tablet for any intensive apps like games, so a new one would be pretty pointless for me. I never had any issues with my charger, well one time one of my charger did blow up, but that's because the battery was faulty for my jump charger for my car. Other than that, you might have some dust in the charger pin hole? Just a guess really.
I'm on my third charger since March. Original Motorola one died, second one (off eBay) burnt out, current one (off eBay) still working but I can't use the touchscreen while unit is charging.
I live remote using an off-grid power supply so this may have something to do with it.
Chelseablue said:
We all know how brilliant a design the charge cord adapter is, I myself am on to my third one in almost two years.
Click to expand...
Click to collapse
Huh. I have four of them, from the original back in Feb '11 to one I was given a few months back, and they all work perfectly- and most of 'em are used every week (two at home, one in the office, one for travel).
agreed with kcrudup, ive been through 2, the only reason being i snapped the connector on the first one when i pulled it out at a bad angle
The charger that came with my refurbished Xoom lasted almost through the first charge. I thought I was going to have to send the whole thing back until I took it into the Verizon store and verified that it charged with a different charger. I've since got one off eBay and another with the standard dock. Both have been holding out so far.
Oh and my Xoom touch screen doesn't respond while charging either. Somewhere I read that a factory reset will fix that... but I'm waiting until my 90 day warantee is up to put EOS on it since my BT mouse works while it is charging.
ByteWrencher
My original charger is still working and I got my tablet 8 months back. I think the charger has lasted pretty well. How long did peoples original ones seem to last?
ByteWrencher said:
Oh and my Xoom touch screen doesn't respond while charging either. Somewhere I read that a factory reset will fix that
Click to expand...
Click to collapse
That's an electrical problem (noise and/or grounding issues with the charger raise the "noise floor" so the touchscreen controller has trouble determining what's a valid touch) and can't be cured by any reset, factory or full or ...
Your issue is your charger- try another.
xoom chargers
Chelseablue said:
...Play dead.
We all know how brilliant a design the charge cord adapter is, I myself am on to my third one in almost two years. Well, the tablet stopped charging today and no matter which wall outlet I used or how much I wiggled the lead I could not make the light come on. Seeing that my Verizon contract is all but done at the end of this month and rather than buy another charge cord I decided to buy a new tab. I just picked up the new Asus Transformer Infinity, not too bad so far. Anyways, about 20 minutes after getting home with neither tablet charged to a useable level, the power goes out for a couple hours- just my luck too. When the power came back on suddenly the light on the Xoom came on. I hadn't touched it since I gave up on trying to get it to charge. Now here I am with two tablets and a $500 hole in my pocket. I know I was bound to get a new one eventually so I'm going to hang on to it but I never saw it happening like this.
Has anyone else had any issues regarding their chargers? Or anything unusual occur in general? I'm sure I'm not alone.
Click to expand...
Click to collapse
Just a quick note.. I've had the ebay sourced chargers fail on my xoom ( and other devices). I found that the power ratings on some of them are rather optimistic... they simply are running at the outer limits to charge the tablet and failure can be internal to the power unit...best case.. or worst case failure dumps overvoltage or raw AC power to the tablet.
Fortunately my failed units were of the internal power supply version.. and aside from bad smells no real damage was done.
I have successfully built charger/power units after scavenging the connector from my failed power supplies and using a minimum 1.5 amp 12v dc supply... they seem to work fine.. and keeping one handy is much more convenient than wondering where I last used it :fingers-crossed:
as always.. your mileage may vary
Hmm, that's interesting. Unfortunately this charger is from Verizon and i would surely hope that their stuff work to the correct specs. I wonder sometimes that maybe the problem could be with the contact inside the tablet. Could that have something to so with it?
Chelseablue said:
Hmm, that's interesting. Unfortunately this charger is from Verizon and i would surely hope that their stuff work to the correct specs. I wonder sometimes that maybe the problem could be with the contact inside the tablet. Could that have something to so with it?
Click to expand...
Click to collapse
I think the Motorola/Verizon chargrs are good. I think the earthing issue is with the cheap chargers from China.
When I lost my cellphone charger I had to buy a Chinese one, well, when charging it looked like possessed by the Devil itself lol! The screen started acting strange and I wasn't able to control it... Then I found my original charger and the exorcism was complete lol^2! BTW, a guy on X10 mini pro community (one of the best developers I ever met - my favorite one ) lost a cellphone with a Chinese charger, so what can I say - be careful with it!
Sent from my MZ601 using XDA HD Premium using 1/8of my brain, the other 7/8 is thinking in my love Isadora

[Q] Motherboard replacement

Yesterday I picked up a used Nexus 7 with a bootloop issue.. spent $10 so I figured worst case I bought an expensive charger for my phone. Either way, it looks like the bootloader is locked and I can't unlock it. Everything I've read seems to point to a bad emmc chip. Would replacing the motherboard solve this issue (assuming the new motherboard doesn't have the same defect). Also could I replace this one (an 8gb) with a 16 or 32 gb board?
I changed my motherboard from 16 to 32gb. All went without a hitch. I got this one...
http://www.ebay.com/itm/261636621214?_trksid=p2059210.m2749.l2649&ssPageName=STRK:MEBIDX:IT
Good luck! ?
Sent from my Nexus 7 using Tapatalk
eLCruz said:
I changed my motherboard from 16 to 32gb. All went without a hitch. I got this one...
Good luck!
Sent from my Nexus 7 using Tapatalk
Click to expand...
Click to collapse
Did you just want to upgrade or was there an issue with the original 16GB? If it's good (and you still have it) would you want to sell it?
I assume my motherboard is zapped. I can charge my Grouper while it's unplugged but no device will recognize it. I made the mistake of upgrading my partition with this issue, now I have a fancy paperweight. Thoughts?
I just ordered an 8GB replacement motherboard from eBay, cost $16.99. I'm figuring I'll be into this thing for a bit under $30 if all works out so worth the gamble I guess. I'll update once it comes in.
My new 32 gb motherboard arrived, and I installed it right away- I felt like it was Christmas morning. Fast forward to closing the case, and I get no power. Not even a weak attempt. I went through everything, it's all properly attached. Still nothing. It's currently charging with no LED light on. I am not optimistic. Anyone have any suggestions?
slyest12 said:
My new 32 gb motherboard arrived, and I installed it right away- I felt like it was Christmas morning. Fast forward to closing the case, and I get no power. Not even a weak attempt. I went through everything, it's all properly attached. Still nothing. It's currently charging with no LED light on. I am not optimistic. Anyone have any suggestions?
Click to expand...
Click to collapse
I replaced my boards also.... Bought a used unit that came from a Nexus that someone had broken the screen on.... So, I received the frame with camera/speaker and boards attached.... only thing missing was the usb/headphone piece which I just took from my old frame....
Put everything together.... sealed it up..... plugged it in..... Nothing...... mild heart attack..... But then, I let it charge for 10 minutes... returned to the unit and pressed and held the power button.... and it fired up....
So, as I don't have a suggestion on if there is something internally wrong.... But sure, that the battery is plugged in securely and give that power button another shot after charging for a little while...
Motherboard came in yesterday, couldn't have been easier to install just have to watch the plastic clips on the ribbon cable connectors, I broke one on the old motherboard, if they are anything like the PS3 if they break you're SOL. The new MB was on 4.2 so I went through the upgrade procedure to 5.0.2 and wow it runs lollipop nicely. Also I ended up getting a 16gb MB so that worked out well.
Try and use a regular tablet charger, which I think is 1.3 or 2.3 amps and not one of the generic chargers which are lower - you will notice a huge difference in charging time. I'm using the tablet charger on my S4 and it goes from 10% to 100% in around an hour.

Think my phone is dead. Won't boot. any ideas?

I've been having a few issues with my Nexus 4 on 5.1.1.
Twice in the past month I've had random Force closures of all aps. Facebook was the worst. But then it goes on to all other apps including the launcher.
First time that happened I did a factory reset and things went well. Yesterday it happened again while it was on another charger and I can get my phone to boot.
The screen backlight looks like is on when it's plugged into the charger and will go out if I hold the power button down for 5 to 10 seconds.
If I hold the power button down for 10 seconds when the charger is connected the LED flashes red till I take my finger of the Power button.
I've let it charge overnight (12 hours) and I've tried holding both volume buttons with the power button.
As well as Volume up and Volume down separately with the power button.
Is the phone dead? anyone got any ideas on how to bring it back to life
I've got a screwdriver set on order as I don't have fine enough star screwdriver to remove the internal battery connection. Which is my next step..
I think you are right to try replacing your old battery. Be careful while scraping it out where it is glued in not to tear it up too bad because it can 'splode. Might want to use a plastic card for that. I used a metal shim, an iOpener, and am much better now...
Sent from my Nexus 6 using Tapatalk
I'm going to try just unplugging the battery from the board first before I attempt to replace it.
Think it's time for an upgrade anyway.
Got my eye on the "OnePlus-X" as my next phone.
Removed the battery and stuck my multimeter into it.
It's got V output of 3.61 volts but amps drop off a cliff to zero as soon as I touch the contacts.
New battery arriving tomorrow.
i have the same problem with my nexus 4 dude. it boots when it is connected to the charger. basically it works like a desktop. I went into recovery mode and did a fectory data reset and wiped all the cache. Pliz help me proceeed. I kind have a hunch that its a software thing. did yours start working ater change of battery? Thanks ..
Suraj Sanjay said:
i have the same problem with my nexus 4 dude. it boots when it is connected to the charger. basically it works like a desktop. I went into recovery mode and did a fectory data reset and wiped all the cache. Pliz help me proceeed. I kind have a hunch that its a software thing. did yours start working ater change of battery? Thanks ..
Click to expand...
Click to collapse
Can you go to recovery without charger plugged in?
karsondang said:
Can you go to recovery without charger plugged in?
Click to expand...
Click to collapse
yes dude. i can go to recovery without it even being plugged in. I m pretty frustrated. I plan on giving it to the repair centre but he will charge me a bit high. Doesnt matter will let you guys know if I do find a solution.
Well my "new" battery arrived yesterday.
And it's getting sent back today!!
Got it through Amazon and when the battery arrived it looked ok but would not charge. I took it out to check the contacts and the ribbon came away form the battery! Looks like it was not soldered to the battery properly (if it ever was!) Just glad it didn't cause a short and kill the phone or myself.
Getting one from a different supplier tomorrow. Hopefully this one will work!
s0litaire said:
Well my "new" battery arrived yesterday.
And it's getting sent back today!!
Got it through Amazon and when the battery arrived it looked ok but would not charge. I took it out to check the contacts and the ribbon came away form the battery! Looks like it was not soldered to the battery properly (if it ever was!) Just glad it didn't cause a short and kill the phone or myself.
Getting one from a different supplier tomorrow. Hopefully this one will work!
Click to expand...
Click to collapse
Please let me know! I've ordered a third battery just now. The first one was an aftermarket one, the second one was apparently a knock-off, this one was smaller than the original one.
The third one is hopefully a genuine LG one since the reseller is listed on LG their site.
Dam!!
Replacement battery arrived today. Looks good.
Installed it and the same thing is happening!
Screen backlight goes on. does not seem to be charging!
Now thinking the motherboard is buggered!
But I'll keep the phone on charge overnight just in case...
Damn that sucks to hear man. Hope it works tomorrow!
Now just searching freebe sites and eBay for any damaged cracked nexus4's I could scavenge from
Suraj Sanjay said:
yes dude. i can go to recovery without it even being plugged in. I m pretty frustrated. I plan on giving it to the repair centre but he will charge me a bit high. Doesnt matter will let you guys know if I do find a solution.
Click to expand...
Click to collapse
After battery replacement, my Nexus 4 is come back
karsondang said:
After battery replacement, my Nexus 4 is come back
Click to expand...
Click to collapse
Good on you!
No point in replacing a great phone if you can help it

Note 8 is Dead.

Well, my trusty Note 8 is dead. I've had this for several years. Love the 8" size and the SPen.
Two weeks ago the tablet was dead so I plugged it in for a charge. Came back several hours later to nothing. (Plug works fine) Tried a hard reboot via buttons, nope.
So I ordered a new battery, and got it yesterday. Opened up the case, replaced the battery and plugged it in. Well several hours later and still nothing. ?
As mentioned I love the 8" size and thr SPen. I don't see a newer version of this, so off to shop.
dtaylorr said:
Well, my trusty Note 8 is dead. I've had this for several years. Love the 8" size and the SPen.
Two weeks ago the tablet was dead so I plugged it in for a charge. Came back several hours later to nothing. (Plug works fine) Tried a hard reboot via buttons, nope.
So I ordered a new battery, and got it yesterday. Opened up the case, replaced the battery and plugged it in. Well several hours later and still nothing. ?
As mentioned I love the 8" size and thr SPen. I don't see a newer version of this, so off to shop.
Click to expand...
Click to collapse
Unfortunately they kind of abandoned this. I have mine bought it used 2 years ago I think. Bought a battery after the seller told me the battery was going, it wasn't the battery and it still works just fine
Sent from my OnePlus 3T
ShapesBlue said:
Unfortunately they kind of abandoned this. I have mine bought it used 2 years ago I think. Bought a battery after the seller told me the battery was going, it wasn't the battery and it still works just fine
Sent from my OnePlus 3T
Click to expand...
Click to collapse
Ya, they seem to be focusing on the 10" tablet range.
dtaylorr said:
Well, my trusty Note 8 is dead. I've had this for several years. Love the 8" size and the SPen.
Two weeks ago the tablet was dead so I plugged it in for a charge. Came back several hours later to nothing. (Plug works fine) Tried a hard reboot via buttons, nope.
So I ordered a new battery, and got it yesterday. Opened up the case, replaced the battery and plugged it in. Well several hours later and still nothing.
As mentioned I love the 8" size and thr SPen. I don't see a newer version of this, so off to shop.
Click to expand...
Click to collapse
hi, you seems to have the same problem as mine,I replaced the charging board (see attached) common fault, purchased one from ebay.
you mentioned you replaced the battery ? sound serious problem or the battery was not connected properly ? some shops out to cheat, pretend that they replaced a NEW battery but actually its an old battery from somewhere. a new battery usually have a 30% charged
Note8 very easy to open, just the back cover, a screw driver will get the charging board replaced
:fingers-crossed:
deranche said:
hi, you seems to have the same problem as mine,I replaced the charging board (see attached) common fault, purchased one from ebay.
you mentioned you replaced the battery ? sound serious problem or the battery was not connected properly ? some shops out to cheat, pretend that they replaced a NEW battery but actually its an old battery from somewhere. a new battery usually have a 30% charged
Note8 very easy to open, just the back cover, a screw driver will get the charging board replaced
:fingers-crossed:
Click to expand...
Click to collapse
If you can avoid it don't get a battery off of whatever site your getting it from unless it's genuine Samsung. The knockoffs try to play it off as Samsung but it isn't
Sent from my OnePlus 3T
ShapesBlue said:
If you can avoid it don't get a battery off of whatever site your getting it from unless it's genuine Samsung. The knockoffs try to play it off as Samsung but it isn't
Sent from my OnePlus 3T
Click to expand...
Click to collapse
sorry mate, you replied to the wrong guy, im not the one who's having the power problem :silly:
deranche said:
hi, you seems to have the same problem as mine,I replaced the charging board (see attached) common fault, purchased one from ebay.
you mentioned you replaced the battery ? sound serious problem or the battery was not connected properly ? some shops out to cheat, pretend that they replaced a NEW battery but actually its an old battery from somewhere. a new battery usually have a 30% charged
Note8 very easy to open, just the back cover, a screw driver will get the charging board replaced
:fingers-crossed:
Click to expand...
Click to collapse
I have my father in law who is an electronics wiz looking it over
dtaylorr said:
I have my father in law who is an electronics wiz looking it over
Click to expand...
Click to collapse
Good, get the qualified tech to check, battery dead or the chipset dead by using the multimeter for voltage etc.:good:
its still wise to change the power board, NOT repair the board bcos the board is very sensitive to be repaired even the "expert" at the repair shops I went thru the years cant do a good job repairing the power board. funny symtoms of note8, always ended in the powerboard, "sometimes it charge n sometimes it doesn't charge at all." never the battery. never had problem with the battery, yet ! :cyclops:
*not expensive to buy a powerboard n they send internationally.
PS" in the end i swop a new powerboard, my note8 comes back alive kicking n never need another repair for 3 years now.
dtaylorr said:
Well, my trusty Note 8 is dead. I've had this for several years. Love the 8" size and the SPen.
Two weeks ago the tablet was dead so I plugged it in for a charge. Came back several hours later to nothing. (Plug works fine) Tried a hard reboot via buttons, nope.
So I ordered a new battery, and got it yesterday. Opened up the case, replaced the battery and plugged it in. Well several hours later and still nothing.
As mentioned I love the 8" size and thr SPen. I don't see a newer version of this, so off to shop.
Click to expand...
Click to collapse
Ah another Note 8 waisted by flashing with a Note 8.0 firmware.
gooberdude said:
Ah another Note 8 waisted by flashing with a Note 8.0 firmware.
Click to expand...
Click to collapse
By reading this nowhere did it say he flashed the wrong firmware
Sent from my OnePlus 3T
deranche said:
hi, you seems to have the same problem as mine,I replaced the charging board (see attached) common fault, purchased one from ebay.
you mentioned you replaced the battery ? sound serious problem or the battery was not connected properly ? some shops out to cheat, pretend that they replaced a NEW battery but actually its an old battery from somewhere. a new battery usually have a 30% charged
Note8 very easy to open, just the back cover, a screw driver will get the charging board replaced
:fingers-crossed:
Click to expand...
Click to collapse
ShapesBlue said:
By reading this nowhere did it say he flashed the wrong firmware
Sent from my OnePlus 3T
Click to expand...
Click to collapse
I did flash, but this was over a year ago.
dtaylorr said:
I did flash, but this was over a year ago.
Click to expand...
Click to collapse
its abt the power, power board simply means controller of all your power, dude :victory:
its a common fault in your note 8.0 all leads to the power board.
if handled normally ofcos :fingers-crossed:
forget abt giving the expert to repair the board, jumper wire works but only afew days or months. your best bet is replace the power board !!! end of repair, new life to your note 8.0 :laugh::laugh::laugh:

Moto g7 power died

Hello,
I got a new moto g7 power a few weeks ago and promptly cracked the screen. Bought a replacement from eBay which worked for an hour. Then died , taking the whole phone down. No sign of life whatsoever. I bought new frame, battery, charged over night and there is nothing. I know how to reset it. The thing is dead and xfinity said tough luck. Does anyone have the slightest idea what could be wrong? Thanks P.S. how to check usb-c ? I own only the phone to check it.
Motomark said:
Hello,
I got a new moto g7 power a few weeks ago and promptly cracked the screen. Bought a replacement from eBay which worked for an hour. Then died , taking the whole phone down. No sign of life whatsoever. I bought new frame, battery, charged over night and there is nothing. I know how to reset it. The thing is dead and xfinity said tough luck. Does anyone have the slightest idea what could be wrong? Thanks P.S. how to check usb-c ? I own only the phone to check it.
Click to expand...
Click to collapse
Do you have a PC?
If so see of it is listed in Device Manager as Qualcomm
Sent from my mata using XDA Labs
Pc port
Yes, I also bricked it and was only able to get it back by use of device manager. Pc doesn't even acknowledge my connecting the phone. I ordered the LCD cable that runs under the battery today. As I did crimp it pretty good taking out the battery. Fingers crossed that solves the problem. However, I don't think it would be dead just because screen is not functional. Seems it should be able to power up.
Update
Nothing in my life suggested that I could change a phone screen. I don't know why I tried. I give up. Thanks

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