Database Users

[Q] Is this an issue of a dead battery?

While charging my Nexus 7 I noticed that the battery was actually draining rather than charging. This is happened in the past as well where I would plug it in overnight and find it at 42%. My Nexus also dropped from 100% to 77% in less than an hour with no use at all.
Recently while charging I went into the bootloader to shut down the Nexus. Now I plug it in and the screen is blank. I have tied a rubber band around the power button so it is constantly being pressed.
Is this a battery issue that can be solved by simply ordering a battery on eBay and changing it? The past behavior of the tablet makes me think it's either a software or battery issue.

i have the exact same thing... n7 is dead as a brick... have tried everything... i also measured the battery and it's on 0.93 v so there is still juice inside...
can't figure why it doesn't work... if u find something plz let me know too

mine done the same thing . But it done so after leaving it for a few weeks not charging. I charged for like 30 minutes . turned it on . It started updating apps. then all at once screen went off. and that was it..
I had square trade warranty as my tab was bought back when 32 gb 2012 version came out. So i sent it in and they fixed it . I have no idea what they done but it has the same serial numbers mac address and so on. So i suspect it was just revived somehow.
I sent email asking exactly what was done to fix it with no reply back.

Don't have a warranty... it the 1st Gen n7 so I called Google and it doesn't have warranty
Sent from my SAMSUNG-SGH-I727 using Tapatalk

I'm way past warranty. I've had it a couple of years now.
I bought a battery off of eBay. I'm going to remove the back cover and replace the battery and hopefully that will fix the issue.
Will update with the results or lack of results.

[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:

Galaxy S7 Edge won't charge/boot/anything

Hello all,
this is a rather strange thing that recently happened: my dad's galaxy S7 edge which has been working completely flawless the last few years recently decided to just turn it self off. He handed it to me saying it was working fine last night and trying to use it next day absolutely nothing happens anymore.
I tried to charge via USB with Samsung charger, wireless charger from Anker in case the USB port is defective, and different key combos to restart etc. On PC nothing is detected either..
Could a faulty USB charger have killed the device? When plugging it in, there is absolutely no sign of life - you can hear a faint "buzzing" but no indicator lights etc..
Does anyone have any tips? It would be really appreciated!

Battery or port pcb failure. Maybe both.
Replace battery as it's long overdue.
Once an Li reaches 80% of its original capacity it's reached the end of its usable lifespan.
It's degraded at that point. Degraded Li's are more likely to fail. Any swelling is a failure; replace immediately if observed.
Replace battery and go from there...

Thanks @blackhawk for the tips and insight - I will try to replace the battery!

keebfox said:
Thanks @blackhawk for the tips and insight - I will try to replace the battery!
Click to expand...
Click to collapse
On a heavily used device the battery lifespan is typically 1-3 years.
I plan to replace my N10+ device's battery about every year, routine maintenance.
A failed Li can do a lot of damage. It rests on the display... which is somewhat fragile.
Get a new rear cover seal when replacing the battery so it retains its water resistance. On AMOLED (NOT LCD displays!!!) displays anhydrous isopropyl alcohol can be used to help loosen the double sides tape on the rear cover and battery if you do it yourself.
Controlled heat is used to help loosen the rear cover on most of these phones. Many shops will replace the battery for a low price as well.

Pretty amazing stuff right here. My S7 Edge did the exact same thing last night.
Think Samsung hit the kill switch.

I'm writing this message from my dad's s7 edge which has kinda the same problem but it's still usable. It shuts down suddenly (even with battery full 100%) and the only way to turn it on is plugging it to the charger, otherwise no sign of life.

keebfox said:
Hello all,
this is a rather strange thing that recently happened: my dad's galaxy S7 edge which has been working completely flawless the last few years recently decided to just turn it self off. He handed it to me saying it was working fine last night and trying to use it next day absolutely nothing happens anymore.
I tried to charge via USB with Samsung charger, wireless charger from Anker in case the USB port is defective, and different key combos to restart etc. On PC nothing is detected either..
Could a faulty USB charger have killed the device? When plugging it in, there is absolutely no sign of life - you can hear a faint "buzzing" but no indicator lights etc..
Does anyone have any tips? It would be really appreciated!
Click to expand...
Click to collapse
I believe, most of this case was caused by power IC, my s7 edge was suddenly died last night too. You can see on this thread and tutorial.
https://www.ifixit.com/Answers/View/650291/My+S7+won't+turn+on.+It+overheated,+and+now+it+does+not+respond.

FNDRSM said:
I believe, most of this case was caused by power IC, my s7 edge was suddenly died last night too. You can see on this thread and tutorial.
https://www.ifixit.com/Answers/View/650291/My+S7+won't+turn+on.+It+overheated,+and+now+it+does+not+respond.
Click to expand...
Click to collapse
Wow, thanks so much! This is definitely worth a shot

keebfox said:
Wow, thanks so much! This is definitely worth a shot
Click to expand...
Click to collapse
Yeah, i want to try this too, but i think it cost too much money, not worth for me. And also i dont trust to much for 3rd party repair on here except samsung service center.
But u can give it a try. Hope it works.