Develop Bugs

[Q] Tab 3 7.0 SM-T210 reboot loop and no recovery

Hey guys, have a friends Galaxy tab 3 (7 inch, SM-T210) which simply won't power on.
Firstly, the device came to me because it was completely dead. He is using an Apple charger (5v 1A) which I believe isn't the right output.
After leaving it plugged into the Apple wall charger for more than a full day, it will power on the display and go into a boot loop (displays Samsung logo for about 10secs then reboots).
It never gets to a point where it shows the battery charging icon.
If I do anything to it (hold power button, power+home+volume up, power+home+volume down) while it is in this reboot loop, it simply dies again and needs the full (more than) a day charge again before powering on the display.
It won't go into recovery or download mode.
The longest I have left it charging thus far is about 2.5 days and still the same problems.
I have tried disconnecting the battery connector multiple times also (left disconnected for up to 5 minutes) - this just causes me to have to start the whole charging process again.
Any ideas? I'm currently leaving it plugged into my PC (rear powered USB port) in the hope that it will charge properly - or at least detect a connection to the PC when it enters the bootloop (maybe try ADB).

@fubofo
I know it is difficult.
A) Regards the Power Adapter.
Listen PC USB port should not be used as a charging station. You always run the chance to burn your PC!
In the other hand PC USB is designed to produce 5V but only 0.5 A.
We should always used the Power adapter that came as original accessory. I own a TAB3 10 wifi. Due to our 10" big screen our OEM adapter is 5V 2A. But in your case 5V 1A is fine. It just charges slower.
B) The most used solution is get in to Download Mode and Install Original Stock software. The other possible solution is to get into Recovery Mode and do a Wipe of Cache and Dalvik and if possible a Factory Reset.
I know you said: "It won't go into recovery or download mode." But there is no other way.
In my cases Tab3 10 Wifi I can not get the battery out. But since you are saying that you can, I will suggest you unplug the battery for a minute. Hoping that when you reconnect it it would not turn on by it self:
1) Turn your PC On.
2) Start Odin3.07 and prepare to install your Original Stock ROM.
3) Connect the USB Cable to PC but NOT to TAB. As you see we only want to be ready to install Stock Rom is everything goes OK.
4) Disconnect the Battery on Tab, (If not possible Press Power for 6-8seconds and release, If it reboots Press Power for 6-8seconds and release. Keep trying until you see it stop doing the loop with Samsung logo. We are trying to ensure is in OFF and that it does not reboot)
Note: Please understand that if you keep pressing [Power] or any other sequence of buttons longer that 8 seconds it just loop once and nothing happens. You need to release the [Power] button.
5) Wait a minute disconnected. (OFF)
6) Reconnect Battery. This is where I an hoping that the Tab will not Turn On by itself! I do not know I never disconnect my battery.
7) Be prepare to Hook the USB cable from PC. Now Press ONLY [Volume Down] and Hook USB cable at the same time. It is been said that when we press Just [Volume Down] from OFF the battery registers are reset and the Battery Icon comes up in your screen!! At least this behavior work in TAB3 10 Wifi. I am not sure in yours.
If you see I am just trying to get away from the "Loop on Reboot" situation. And I believe it your best chance to ensure is in charging state. If you like you can leave it charging for at least 1 hour with the battery logo. If the battery logo goes away and you want to check if it is still there DO NOT USE [Power] BUTTON. use the [Menu] instead. In fact in this mode you can unhook the PC USB cable and Plug your Power Adapter with I believe is twice as effective charging than the PC USB.
Now lets say that when you unplug and reconnect the battery, Tab3 instead Reboot (power on) Then what I will suggest you is to get help from some body else so that you have an extra pair of hands. The Idea is that if it power on by it self ,that you can be only in charge of Pressing Just [Volume Down] while hooking USB cable. The other person will be in charge on reconnecting the battery. I hope you get my point.
Lets continue
8) So now that you have a TAB charged you can ensure that PC is connected to USB cable and Odin is ready.
9) With the battery Icon on the screen, now you can Press [Power]+[Menu]+[Volume Down]. to get in to Download Mode. Note that In my case a TAB3 10 Wifi I do not need to press [Menu], Just Only [Power]+[Volume Down].
10) Follow any Tutorial in the use of Odin for your device. Just be sure NOT to mark "Re-Partition" unless you had received a packages that requires that. If you do not know that means it is NO repartition. Understand that re-partition without having a complete package will Brick your device. Most Odin packages have only the minimum packages so do not required re-partition. You been warned.
I hope this will help you.

r2d23cpo said:
@fubofo
......................................
1) Turn your PC On.
2) Start Odin3.07 and prepare to install your Original Stock ROM.
3) Connect the USB Cable to PC but NOT to TAB. As you see we only want to be ready to install Stock Rom is everything goes OK.
4) Disconnect the Battery on Tab, (If not possible Press Power for 6-8seconds and release, If it reboots Press Power for 6-8seconds and release. Keep trying until you see it stop doing the loop with Samsung logo. We are trying to ensure is in OFF and that it does not reboot)
Note: Please understand that if you keep pressing [Power] or any other sequence of buttons longer that 8 seconds it just loop once and nothing happens. You need to release the [Power] button.
5) Wait a minute disconnected. (OFF)
6) Reconnect Battery. This is where I an hoping that the Tab will not Turn On by itself! I do not know I never disconnect my battery.
7) Be prepare to Hook the USB cable from PC. Now Press ONLY [Volume Down] and Hook USB cable at the same time. It is been said that when we press Just [Volume Down] from OFF the battery registers are reset and the Battery Icon comes up in your screen!! At least this behavior work in TAB3 10 Wifi. I am not sure in yours.
.....................
I hope this will help you.
Click to expand...
Click to collapse
@r2d23cpo thanks for this information, though there is a problem. As soon as I unplug it from the wall charger it stops the reboot loop and just does nothing.
Also....why do I need to connect it to PC via USB with Oden if we are not yet going to flash it? Would the wall charger works just as well after I connect the battery? (disconnect battery, wait 1 minute, reconnect battery, Hold Vol Down + connect charger)

fubofo said:
Hey guys, have a friends Galaxy tab 3 (7 inch, SM-T210) which simply won't power on.
Firstly, the device came to me because it was completely dead. He is using an Apple charger (5v 1A) which I believe isn't the right output.
After leaving it plugged into the Apple wall charger for more than a full day, it will power on the display and go into a boot loop (displays Samsung logo for about 10secs then reboots)....
Click to expand...
Click to collapse
I've noticed this with the Apple charger. But only with this particular model. I experienced none with the SM-T217. Other Samsung devices also charge fine with the same charger. The tab wouldn't show the battery icon at all, and the screen kept flashing. I left it plugged in for 1/2 hour and it moved up 1%. I don't believe it's the amp, 'cause the tab charged fine with a 1A Samsung or LG. You should switch to another charger first lest it damages the battery somehow.

graphdarnell said:
I've noticed this with the Apple charger. But only with this particular model. I experienced none with the SM-T217. Other Samsung devices also charge fine with the same charger. The tab wouldn't show the battery icon at all, and the screen kept flashing. I left it plugged in for 1/2 hour and it moved up 1%. I don't believe it's the amp, 'cause the tab charged fine with a 1A Samsung or LG. You should switch to another charger first lest it damages the battery somehow.
Click to expand...
Click to collapse
This Tab doesn't ever get to the point of showing the charging icon. I currently have the device plugged into USB port of my server as it's powered on 24hrs. I'm happy to leave it in there for a few days to see if it charges better.
My hope is that it will at least get to the boot loop stage, and maybe show up as a connection on my server so I can fastboot it or something.

fubofo said:
This Tab doesn't ever get to the point of showing the charging icon. I currently have the device plugged into USB port of my server as it's powered on 24hrs. I'm happy to leave it in there for a few days to see if it charges better.
My hope is that it will at least get to the boot loop stage, and maybe show up as a connection on my server so I can fastboot it or something.
Click to expand...
Click to collapse
Not to belabor the point, but mine wouldn't charge at all at 500mA, which is what my regular cell charger outputs. So unless your server delivers more punch than standard USB ports on PCs, looks like you're in for a long and futile wait. Just my guess.

Phone not bricked, but usually won't boot in any way

Hello everyone, thank you for your time.
TL;DR: Phone boots into download mode up until "Downloading...", recovery mode until "RECOVERY BOOTING," and can only boot right when I put the battery in. The battery is fully charged, and I can boot up until my home screen only once so far. Will a jig fix the issue, or should I try to get the phone replaced by TMobile warranty as I have before?
I have a Galaxy S3 from TMobile, and have been running CyanogenMod for about a year now. 2 days ago I flashed a nightly release, which I assume was unstable. Yesterday, my screen was on and then my phone turned off (low battery, but 99% sure it was a crash rather than a power off), and did not boot up again. After attempting to pull the battery out, charge for hours, turn on and plug in (in different combinations), the furthest I could get was a couple of seconds of the CyanogenMod Galaxy S3 logo initial boot screen (not the rotating splash screen).
I took my phone to TMobile today and was about to get it replaced until I realized I didn't mask the flashes.
The last time I was in an exact same situation with the same phone model, and my flash counter was still showing custom firmware, yet I did manage to get it replaced effortlessly, but I didn't want to risk what was a possible fluke again.
I get home, and here's my current situation.
The only way the phone boots up in any manner is when I take the battery out and the charger is not plugged in. Here are the scenarios I run into:
1. Boots into download mode, can press VOL + to get to the "Downloading..." screen, then shuts off 2 seconds after.
2. Boots into recovery mode, only up until "RECOVERY BOOTING", then shuts off.
3. Boot by pressing power button, plug charger in, shows grey battery icon.
3. Boots into download mode, can press VOL -, either shuts off, OR
3b) Only after tons of tries, it booted up all the way up until my actual home screen, then shut off.
I can't have the charger plugged in while booting (pc or wall), and I can only boot right after I put the battery in.
Are there any suggestions as to what I should do? I was thinking of buying a jig from Amazon, but I don't know if it is hard bricked or not. Should I just attempt to get it replaced under warranty once again, even though it shows the flash count?
Thank you very much!

FIX: STUCK POWER BUTTON PROBLEM
So, one thing I didn't check. Take the battery out of the phone, wait about a minute. If it buzzes as if its powering on, that means that your power button (either the actual button itself or the switch on the mainboard) is stuck.
Solution: Smack the power button with your battery until your battery has a (small) dent. If it doesn't work, smack it a couple more times. Took me 2 tries, second try, phone didn't buzz when I put battery in. I press the power button, works like new. Absolutely....ridiculous

New pixel C not charging - can it be charged in recovery mode?

This is the third new pixel C I've tried this week(!) and they've all had the identical problem.. It would be incredibly bad luck to have 3 defective devices so I'm wondering if this is a known problem and there's something I can do to fix it.
The device will never go further than flashing the google logo very briefly. The light bar shows all red for a fraction of a second, then nothing. After this point the display is blank and the light bar is dead and does not respond to tapping.
If I go into recovery and select 'turn off device', the light bar is responsive but just shows a single red segment.
I've also tried the usual 10-20 seconds power off and the volume up/down/power switch combinations.
Is there any way of getting the device to charge from recovery mode?

Wonder if it's reasonable to assume that recovery mode consumes less power so the problem is a deeply discharged battery and I think that is a significant issue with Lipo cells. I assume your " 10-20 seconds power off and the volume up/down/power switch combinations" are those recommended at https://support.google.com/nexus/troubleshooter/3337561?hl=en-GB&ref_topic=6023299
Is the Pixel C charger "intelligent" ? - try a basic charger or a PC if you have a usb A/C cable?

Booted to recovery, powered it down from recovery and left it 2 hours. After a couple of attempts it booted :victory:

I left my pixel c on charge for the night (usb charge hub, 5v/2a, way I've used to charge since I got it), pixel c keyboard attached in the laptop position.
This morning I got up and press the power button to check it is charged and it was sitting on 0% saying it was charging... Power it off, leave it plugged into the wall charger that came with it and 3hrs later still nothing.
Recovery, turn off, closed it up so the keyboard is in put in the bag move, now checked it is charging, 1 red segment flashes. See what happens next. Never had an issue in the previous 7 months of using this device. Very odd, hope it is ok soon... Best Android Tablet I've had, don't really want to buy a new one...
Edit: looks like it is all good. Phew!! Bit strange.

Just Recieved and the same
Another one here with the same "issue" or strange thing that it does before start charging

I have the same issue. I can't get the thing to turn on at all. How do I even get it into recovery?? All I get is the google logo for 1 second, then the bars turn red and everything turns off.
Power button does nothing. Power+Vol Down does nothing.

I have a similar issue! Welcome to 2021. I plug in to charge, lightbar goes to Google colors and then red. It'll do that back and forth without turning on. Any ideas?

Had same Problem. Press vol up and down and then Connect the charger. Then I coud boot in recovery mode. From there rebooted in Android and charge up

Suggestions for things to try with bricked 5x

I was getting a notice on boot that said "Your device is corrupted and cannot be trusted," so I held down the power and volume down buttons to get it to fastboot mode. However, I couldn't get it to be recognized in fastboot on my laptop. At one point I selected "reboot bootloader" and the phone promptly shut off, black screen and completely unresponsive.
From that point on, I can't get it to do anything. I've tried holding power + volume down for 20 seconds and then plugging it in (as noted in another thread) as well as taking it apart and disconnecting the battery to see if that would reset it somehow. No dice.
Any other suggestions before I give up? Thanks very much in advance...

olm3ca said:
I was getting a notice on boot that said "Your device is corrupted and cannot be trusted," so I held down the power and volume down buttons to get it to fastboot mode. However, I couldn't get it to be recognized in fastboot on my laptop. At one point I selected "reboot bootloader" and the phone promptly shut off, black screen and completely unresponsive.
From that point on, I can't get it to do anything. I've tried holding power + volume down for 20 seconds and then plugging it in (as noted in another thread) as well as taking it apart and disconnecting the battery to see if that would reset it somehow. No dice.
Any other suggestions before I give up? Thanks very much in advance...
Click to expand...
Click to collapse
my device is for the most part of the time in qualcomm mode, but I managed to have access to the phone 3 days ago, installing apps & stuff, worked perfectly well until I had
the bad idea to try to charge it through the charger instead of charging it through my computer...
how I've done it?
I used the power reboot technic :
1) pressing the power button for 1 minute
2) doing nothing for some seconds
3) pressing the power button again for 1 minute
4) connecting the phone to the charger, the red light flashed
5) the battery icon appeared soon after
6) waiting for complete charge, phone rebooting
it worked once, so I suppose it can work again. fingers crossed.

Stuck in low battery boot loop

Hello, Huawei gadget friends.
My watch started to go in to a "low power boot loop" a week ago so I left it alone hoping a full drain would restore it back to working condition, but alas not.
So now this is the situation:
1) press button, nothing happens
2) connect to power shows the charging icon (white battery with power sign) and then after a few mins commences a boot loop as follows
3) from the charging icon, then gives the "Device software can't be checked for corruption..." message
4) followed by the red Huawei logo, then a single vibrate and then back to step 3 above
5) removing the watch from the charger stops the boot loop but then shows the low battery icon (white battery with one bar).
In one or two occasions, I saw it boot up to the colorful spinning 4 android wear logo, but did not complete (did not show "Android Wear" before rebooting again.
I have tried getting it to recovery mode screen or fastboot but without success -- I keep getting the second buzz without fail.
When the beta of 1.5 came out, I tried it, but since then, have wiped my mac and don't have the adb/fastboot software anymore. From reading the forums, there is now some new software called TWRP. Please advise what I can do.
Would I be right to suspect that it is some battery problem? Is it beyond help? :crying:
Thanks in advance!
MMM
Edit: I have also left it on for several hours charging (and rebooting constantly), thinking that perhaps it is just low battery -- but no success.

I'm experiencing the same problem, i turned it off yesterday at 17% and connected to the pc this morning to charge. I immediately noticed that it started looping with the white icon and it doesn't turn on, nor boots into download mode.
Have you found any way to restore it?
Mine doesn't show the red HW logo, charged for some hours and nothing.
I noticed that the pc see that there's something connected, but keeps saying "USB not recognized". I don't know what to do, i may open up and disconnect the battery
EDIT: SOLVED, it was just the cable that broke somehow. I soldered a new cable to the circular base but that didn't work, but as soon as i received this i connected to the pc and started pressing the button randomly till it showed the battery logo and started charging

I got this when I plugged it into my laptop. Plugging it into a dedicated USB charger solved my problem - I suspect the power rating on the USB socket wasn't high enough to charge effectively or that the USB socket is faulty in some other way. From what I understand, not all USB sockets are equal in that some are suitable for high-drain devices, some not so much. So trying another USB port on your computer may also help (Unfortunately at the time I was backing up to an external HDD on the other USB so that option wasn't open to me).

guyz, i have tried my method it actually worked on Xperia X Perfomance
When it goes to Bootloop for Drained battery, i just plug the cable and perform activity block method By pressing and holing power and both volume up and down and when it hits the 1st viberation i just simply release the key. (remember dont hold it too much long after 1st single viberation just release the keys ) and your phone will go to block activity mode. charging light will change it colors from red to blue.. after 2 minutes just press power button then you ll get another viberation and your phone will be seen as charged 2% and then it will be normal again...
i think it happens when battery drained and phone is unexpectedly trying to go boot in first place.
thank you