Frequent Reboots and App Crashes on second hand tablet - Galaxy Tab S Q&A, Help & Troubleshooting

Hello,
I purchased a used Tab S 8.4 (SM-T800) a few days ago, and I immediate ran into problems. Most of my apps crash after a few minutes of use, and the whole system reboots frequently.
I've done two factor resets, and i reinstalled the latest firmware from Sammobile. However this didn't solve the problem. I'll mention that the "SecurityLogAgent" would also give me frequent security notifications, but i think this is an unrelated. I've read this is a common issue, and I've disabled it using Package Disabler Pro.
The device currently isn't rooted, but I have no idea what the previous owner did with the device. Any advice would be greatly appreciated.

How to open this tablet:
https://www.youtube.com/watch?v=s46NaOnx3iM
Resolder the black battery connector may solve the problem of reboot.
One quick test, slap hard on the back, near the center, a tablet with badly cracked battery connector will shut down immediately.
It may or may not work on this test, depending how bad the battery connector is.

Related

Tab S 8.4 WiFi, after 6.0.1 update, restarts, white streaks, erratic display touches

Malfunctioning on Marshmallow update from Samsung.
I was going to install Cyanogen OS, but haven't yet.
The update from Samsung to M 6.0.1 seemed to go ok.
But, now I have errant screen touches, abrupt restarts for no apparent reason, and white streaks flashing on the display (intermittent).
It works fine for a few hours, then wacky again.
Is there anything that I can do?
This is the 8.4 WiFi only version. TM-7400 I believe.
No apparent damage to the display, no water damage recently, or ever.
Thanks!
I just now booted in safe mode. Seems to be working OK, but it has worked OK for hours after having the glitches the past couple of days.
Should I remove the SD card? Maybe an app on there is the problem?
What apps do you have? Use this and post a list.
http://www.onyxbits.de/listmyapps
Anyone?
I updated the few remaining apps which required it, and it's run fine since my OP.
I just now saw a white streak on the display, and a few seconds later it restarted by itself.
Thanks.
And, how much time involved in flashing Cyanogen Mod for a first time ever having done it?
Sorry, I didn't see this reply. I'll post apps list shortly..
TY.
steamrollerpark said:
What apps do you have? Use this and post a list. I'm using a different device, presently to post here.
I'll log in on affected device, of I can.
http://www.onyxbits.de/listmyapps
Click to expand...
Click to collapse
What you need to do to fix this is:
Open tablet. Pull battery out for 3 minutes , pop it back in. Close tablet, your tablet will be fixed
Removing the battery is not only troublesome but seems a little unnecessary.
You should try formatting all partitions through TWRP and reflashing the 6.0.1 firmware using Odin. I did that and have no issues with my device.
The 3 symptoms this dude has are what the battery issue have. Pulling the battery and getting into the inside are not difficult with the correct tools from Amazon or eBay and tutorials from YouTube. This fix has worked with my gfs tab s
suburbadroid said:
The 3 symptoms this dude has are what the battery issue have. Pulling the battery and getting into the inside are not difficult with the correct tools from Amazon or eBay and tutorials from YouTube. This fix has worked with my gfs tab s
Click to expand...
Click to collapse
While removing the battery can be a good idea for removing leftover electricity from the circuits and probably fixing those issues, if not careful can end up breaking some component.
He said when booting the device in safe mode all issues disappeared, so flashing the stock rom using Odin probably will solve all problems.

Rebooting every few minutes - my tablet now resembles a potato

Hi all,
I have a vanilla, unrooted tablet which had Marshmallow installed a few weeks ago. It reboots constantly (like I am lucky to get 2-3 minutes out of it). Sometimes it reboots 7 or 8 times in a row until I give up and hold the power button down.
Have cleared cache and factory reset (multiple times). This hasnt solved the problem. I thought this might be an issue with the Google Play Store, as it generally crashes as soon as I run this (as the first thing I do after the reset) - so after one of the resets I downloaded the latest playstore APK and installed it. Also did not login to the play store in case this was corrupted or something. Have tried this without loading ANY apps other than the stock that comes after the reset - but still the issue persists.
All of the above has been done with the SD card removed - and with full charge
Generally it crashes as soon as I try and run any app or go to settings etc. This is even with the completely factory reset and wiped tablet with no additional apps installed.
Having tried everything, am down to the theory of hardware fault - specifically the battery. After the last update (which failed half way through) I had big problems with battery life and the tablet got (and still gets) quite hot. I am thinking something in the new update might have put extra stress on the battery, which after a few weeks has caused it to fail.
Is this possible, and is there anyway in logs etc to tell if this is hardware or software?
Anyway, other than throwing this away and buying a new one - am not sure what the next step to solve this is. (Maybe revert to previous Android?). Any suggestions or help is welcome, but I am thinking of throwing this away and not throwing good money after bad...
(Have emailed Samsung but of course never heard back - so suffice to say my next tab wont be Samsung)
try download your stock firmware and flash it with odin via your pc.
i had problem with my tab...i had restarts always...whatever i do, every few seconds it restarts by itself... but it works normaly on cable so i went to search for a solution and lol i laughed when i saw what was the solution...i removed the backcover fo the device and then just reatached the battery connector cable and thats it and now my tab works normaly even on battery.not sure if u have similar issue but u can try it it will take u 5 min work and also u have video on Youtube how to dissambly galaxy tab S...cheers mate and wish u good luck
I solved this prob yesterday, itb works fine nw, didnt crash since, just open the tablet remove the basttery vlean its pins then reinstall it
U can find vedios explaining hw to remomve z battery
OK - have updated firmware with ODIN (and tried 3 different versions going back to Android 5)
Have undone the back and removed battery and reset cables. Even replaced the battery with one I bought off Ebay
Cant think of anything else, must be a fault on a board somewhere...
I think she is dead. :crying:
Thanks to those who posted and sent me PM's - really do appreciate it.
By the way, it is definitely something to do with the power. When it reboots and it is attached to a USB, the screen flashes up with the empty battery (ie charging from completely empty) symbol momentarily (maybe a second or 2 tops) before flashing up with 64% or whatever the actual battery level is...
michjfro said:
By the way, it is definitely something to do with the power. When it reboots and it is attached to a USB, the screen flashes up with the empty battery (ie charging from completely empty) symbol momentarily (maybe a second or 2 tops) before flashing up with 64% or whatever the actual battery level is...
Click to expand...
Click to collapse
If your battery can go from 0% to 64% in a few seconds, the battery connector needs to be resoldered due to cracked solder joints.
This rework only takes 5 minutes , ask a repair shop or anyone knows how to solder for assistant.
https://www.youtube.com/watch?v=DaAKjmrMR2s

Random Reboots?

I was just wondering if anyone else has an issue with their Note 4 rebooting randomly with no external input. This started happening with the Android 6.0 update both on the download from here and the AT&T official release, Any Ideas? I've already purchased a new battery due to a separate issue, any idea?
I had the same problem. The phone would freeze and randomly reboot. Sometimes the system crashes and asked me for the typed-in password (not fingerprint). Sometimes when I charge the phone, and unplug the power cable, the charging led stays lit and the battery has to be pulled. I decided to switch the battery with my wife's Note 4 and see if the effects remained. So far I haven't had any problems after switching the battery, so I believe the battery may be the cause of all these issues. I'll keep you updated on the issues.
I'm back. The battery replacement didn't fix the reboots. I think my phone's hardware is permanently damaged. :crying:
have you downgraded?
and can you help me with my problem?[
AlexanderDAB said:
have you downgraded?
and can you help me with my problem?[
Click to expand...
Click to collapse
I'm downgrading to stock 5.1.1 right now. I'll keep you updated. I placed an order for a Galaxy S7 Edge International Version (G935F) yesterday.
ajumatt said:
I'm downgrading to stock 5.1.1 right now. I'll keep you updated. I placed an order for a Galaxy S7 Edge International Version (G935F) yesterday.
Click to expand...
Click to collapse
can you downgrade to Android 5.0.1 and help me with my problem?
its something completely different to this topic
I've been having the same issue, started about 2 weeks ago. phone would start being sluggish then if I continue tapping on screen, it'll reboot. At least once I saw it go into recovery & reinstall firmware(?). Another time it just sat at the bootloader screen waiting for software download or something till I took out the battery. Most likely it's a software issue related to 6.0 update or updates afterwards. taking out the SD card helped a bit.
but basically got annoyed & upgraded to LG V20 today. Coincidentally, there was another person at the AT&T store with a Note 4 having the same issue.
Mine just rebooted twice on me a while ago, first is emergency calls only now the reboots then what. And yes the slow charging is a problem too. MM got serious issue dam att
Sent from my SAMSUNG-SM-N910A using XDA-Developers mobile app
adavis1201 said:
I was just wondering if anyone else has an issue with their Note 4 rebooting randomly with no external input. This started happening with the Android 6.0 update both on the download from here and the AT&T official release, Any Ideas? I've already purchased a new battery due to a separate issue, any idea?
Click to expand...
Click to collapse
use wakelock its an app u get it from play store.it makes ur cpu always running.some how it fixes the problem of random reboots. dl it and set it to partial lock (the 5th option)
Same problem. Just started a few weeks ago. REALLY frustrating having to enter my password every 3-4 minutes. NEVER buying another Samsung, too many damn issues with this phone.
My reboots tend to happen once the phone goes below 60% battery. It's fine above 60%. Once it goes below 50%, the reboots tend to happen with any intense network activity. The phone will often go from 50% to 22%. I forgot what the 30's and 40's look like. I will try the Wakelock app.
Ugh. I posted about this a few weeks ago. It's started happening more frequently and will occasionally go into a boot loop or show 0% battery even though there's a charge.
Has anyone found any solution? I haven't tried wiping / resetting but I'm getting close to trying it.
Here is a cautionary tale for you. My completely stock, unroooted phone started acting the same exact way. On the 4th or 5th battery pull (to fix a frozen screen) it just crapped out. It's totally unresponsive. Deader than a door nail. Tried everything. The download mode, discharging by power button depression/battery removal, etc. Adb shell command does not detect it. Nor Odin. Computer throws up a qhsusb_bulk error when I plug it into pc. I have NO CLUE how to fix it & I am desperately seeking a solution. Please proceed wisely with your oddly acting phones & don't let this happen to you.
k.babymamma said:
Here is a cautionary tale for you. My completely stock, unroooted phone started acting the same exact way. On the 4th or 5th battery pull (to fix a frozen screen) it just crapped out. It's totally unresponsive. Deader than a door nail. Tried everything. The download mode, discharging by power button depression/battery removal, etc. Adb shell command does not detect it. Nor Odin. Computer throws up a qhsusb_bulk error when I plug it into pc. I have NO CLUE how to fix it & I am desperately seeking a solution. Please proceed wisely with your oddly acting phones & don't let this happen to you.
Click to expand...
Click to collapse
Same issue. Just got off the phone with Samsung support, all possibility of having this particular phone with this particular issue sent in for evaluation has been suspended. Translation, they know it is an issue and will not stand by the changes they push to their products (latest OS). I am researching the prospect of legal action since THEY pushed the new OS against my request. Shouldn't that affect the warranty or coverage? Consulting my attorney friends as we speak. Will let you know. I am not sure how WakeLock will help, it is not going to sleep, it is repeatedly power cycling through a kernel process until the battery overheats or it reboots.
Same issue
Since Marshmallow, my 910A will get sluggish or freeze, shut down, sometimes reboot and sometimes just brick (temporarily). Sometimes--more often in recent days, I get a "dll_mmc read fail" message and the target that says do not stop downloading. No matter what I've tried--factory and soft resets, cache clearing, battery pull, replacement, and SD card switch, contacting AT&T and Samsung rep--it doesn't seem to change. This is a daily issue and becoming more frequent. Any suggestions or do I just need a new phone? Thank you.

AT&T Note 4 Edge Slow/Freezing/Randomly Re-booting After Marshmallow Upgrade

Hi there, I have a locked AT&T Samsung Galaxy Note 4 Edge (SM-N915A) that is experiencing issues after the Marshmallow upgrade (6.0.1). I have had the following issues:
--> phone freezes (will not wake after wallet is closed and then opened);
--> the phone will randomly re-boot;
--> if phone is awake, the response times have been very slow;
--> Issue seems to occur more often when charging
The only method to remedy the issue is to remove the battery and then power back on. I have wiped cache and factory reset the unit but still experience the same issues. I went to Samsung desk at Best Buy and they re-flashed the operating system but this did not fix the issue. I finally narrowed down the issue to the Samsung Gear application (I have the new Frontier Gear S3). When this application is not running the issue seems to disappear (although still testing). I am attempting to pinpoint whether NumberSync is causing the issue or the application itself. Has anyone else experienced this issue?
Update: while writing this email, my unit just re-booted when I woke it up
Any suggestions would be greatly appreciated....
Update to issue...
I attempted another factory reset. Again, once I installed the Samsung Gear application and proceeded to setup my Gear S3 wearable, the phone started to "act up". Details on setting up Frontier Gear S3...
--> Downloaded/Installed Samsung Gear application
--> Used "Connect to New Phone" to setup Gear S3
--> Setup and Activated NumberSync
After this process, phone response time was sluggish and then froze. I pulled the battery, and then uninstalled the Samsung Gear application, and the phone seemed to recover. After some careful thought, I performed a complete factory reset on my Gear S3 wearable (in lieu of using "Connect New Phone"), then, I re-installed the Samsung Gear application. The phone seemed to be functioning as normal. I proceeded to setup NumberSync and again, the phone was still functioning as normal for most of the day. In the evening, I setup the wearable (added back watch faces, setup S Health, added localized weather and setup notifications). The phone still seemed to be fine. I plugged the phone in to charge (fast charge) and left the phone alone. Came back several hours later and the phone had froze. I concluded that my issue is directly related to the Samsung Gear application although I am continuing to test.
UPDATE 4/5/2017 - After experiencing 2 weeks of freezing, slow response times, removing the battery, numerous re-boots and factory resets my phone finally died (would not power on). I finally succumbed to calling Samsung Customer Care. I sent my Note 4 in for servicing on March 29th. Here is the response: Problem found: NO POWER UP - IF/CHARGING PORT - FWT - LOW BATTERY (STBY) Solution: REPLACED PBA - REPLACED COMPONENT. I think this means they changed out the motherboard and also replaced my battery. My Note 4 is performing flawlessly thus far. The only issue I have is the timing of all of this....I started having problems directly after the Marshmallow (AT&T 6.0.1) upgrade. My wife and son have the same phone, bought at the same time, and are also having issues but not as profound as mine.
Maybe it has something to do with the notifications on the Gear? My phone was aggressively rebooting after a notification from Hangouts would arrive. I have the Gear Fit 2.
I was just about to give up on this phone today, but I'm hoping that removing the Gear app may stop the freezes.
Followup from earlier. Nope, removing the Gear app for me didn't fix my phone. I'm not getting reboots, but it is still freezing up. Sorry dude/ dudette. I think I'm going to have to bow out of the Note 4. It was a great phone for me.
Same happen today to my SM-N910A. It happened after half of a year successful run with 6.0.1.
Erasing cache and factory reset bring no results.
Unfortunately the phone looks slow even in recovery. Is it a hardware failure?
filon said:
Same happen today to my SM-N910A. It happened after half of a year successful run with 6.0.1.
Erasing cache and factory reset bring no results.
Unfortunately the phone looks slow even in recovery. Is it a hardware failure?
Click to expand...
Click to collapse
My issue turned out to be a HW and battery issue (as noted in my original post above (updated))
cswackha said:
My issue turned out to be a HW and battery issue (as noted in my original post above (updated))
Click to expand...
Click to collapse
I've been having the same issue for the past year after the update to 5 and i've researched and purchased 5 new batteries as that somewhat made the issue better but it freezes sometimes up to 10 times a day. currently i can't get it to actually boot. usually i can get it working but i'm so upset with theis phone. for the 1st year it was great. purchased dec of 2014 on the ATT Next plan. I think i have 1 more payment but there are no phones ATT offers that I like. I'm calling Samsung.

LG G3 Keeps shutting down - is it hardware?

Few days ago my phone began to shutdown either immediately or after a short freeze of the system. This happens in many situations, although mostly outside/when I'm on the move (I tried disabling GPS but it didn't help). Usually when I switch it on again it either shutdowns just as the lockscreen appears or doesn't work at all until I remove the battery for at least 10 seconds. The latter sometimes helps and the phone works properly for a couple of hours and the whole thing start over. I tried clearing cache, restoring factory defaults, changing the software completely (Fullmics, LineageOS) but nothing helps. I made sure that this is NOT battery related - I have a spare one and it's all the same.
I'm not sure whether the issue is hardware or software related. Here are my suspicions:
Why it might be a software issue:
- Just before the phone shut down for the first time I noticed that the upper part of the display stopped working - I simply could not pull down the notification bar. I rotated the screen and noticed that the same thing happens to the menu buttons which obviously replaced notification bar in the upper part of the screen. Eventually it turned out that this is not a defect of the screen and that part of the screen simply froze. After reboot it worked normally for a while and then froze again. After changing the software the problem seems to be gone.
- When I'm in recovery mode (TWRP) the phone usually is stable, it shut down only once or twice
Reasons for hardware:
- For a couple of months now the Wi-Fi is not working properly. It disconnects and whenever I try to reestablish the connection it goes into "Saved->Connecting->Saved". Maybe this is just the next step towards the graveyard?
- It's about 6 months since the warranty has expired
Have you experienced this and/or have any idea what's going on?
EDIT: With time it was more and more difficult to turn the phone on and keep it running and right now it's not turning on at all.
EDIT 2: I made it run again. TWRP works perfectly but once I reboot to System it shuts down almost immediately.
Nobody has any idea?
I'd guess it's the battery.
When I bought my G3 in Oct 2015, I had random reboots aswell, nothing helped (turning off mediascan, restore kdz via LGFlashtool 2014 etc.).
So I went ahead and bought another battery (7000mha) from ebay.
Never again suffered from those annoying random reboots
(Inserting the old battery, makes the reboots reappear, so that is postivie proof for the battery thesis).
-Rye- said:
I'd guess it's the battery.
When I bought my G3 in Oct 2015, I had random reboots aswell, nothing helped (turning off mediascan, restore kdz via LGFlashtool 2014 etc.).
So I went ahead and bought another battery (7000mha) from ebay.
Never again suffered from those annoying random reboots
(Inserting the old battery, makes the reboots reappear, so that is postivie proof for the battery thesis).
Click to expand...
Click to collapse
As I wrote above, I have two batteries and the problems exists with both of them.
In that case try this:
https://forum.xda-developers.com/lg-g3/general/g3-hardware-problems-solved-bsod-screen-t3597086
Regarding your battery: You didn't only get "original" batteries ? I have a third party one... All original ones I had so far failed me...

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