SMT700 screen flicker & reboot issue - kinda solved - Galaxy Tab S Q&A, Help & Troubleshooting

It started about 8 months ago, in retrospect, after an OTA update. I'd be looking at some app when the screen would flicker and shortly after it would either go blank, reboot or simply turn off, it was maddening and I thought the end of my little tablet. I tried a couple of different things, thinking that somehow the bootloader got corrupted I reflashed that, didn't work. I then flashed the previous version of the bootloader, that really didn't work so flashed back. I'd always kept the tablet with the stock Samsung ROM so flashed the latest Lineage ROM (great piece of work) but that didn't help and actually made it worse, when I would reboot it seemed like it would immediately flicker when things were updating, it wouldn't stay on for more than a minute. I read about the potential for cracked battery leads so changed the battery and reflowed the solder around the terminals, that didn't solve the problem either. After that I started to suspect some kind of memory/software issue so in desperation I flashed it back to the beginning of time, the original Samsung ROM and that worked. I have the TAR if anyone needs it just let me know. After you do this your back to Android 5 and you'll notice that it will notify you of OTA updates, I updated BUT I found that past the 4th update the flicker came back, this might just be an issue with my tab but just be aware. I only use this now to read the news or my Kindle books, I did notice that some apps would trigger the flicker like My Radar or Zillow so I uninstalled them.
Hope this helps.

Related

[Q] P600, strange flickering and reboot

Hi all,
This is The premise:
My note 10.1 has been a good companion for an year and an half now, and i always kept it in good shape.
However, since december the battery just stopped charging as it used to.
To simply put it, it just took a lot to charge (as if the tablet didn't receive enough energy) and the battery drained at insane speed.
Not knowing what to do, and having a void warranty (i know, sucks, but with the vanilla p600 i coulnd't even open the pdfs i use to study, so it was useless to me ) I just had to bring it to a local repairman who is affiliated with samsung. They immediately ruled out the possibility of it being the battery, and they said it was probably something related to the simple connector, that they changed with an original one.
Now the real trouble:
After they gave it back to me, the tablet can't go 5 minutes without the screen flickering like crazy and then rebooting.
I tried different ROMS, thinking it could have been something related to the Ios. CM12, Hyperrom p600, the vanilla Rom that was originally in my tablet and so on.
The big problem is that this unnerving flickering and rebooting is not tied to the ROM, as it happens even when i'm just using TWRP (version 2.6.1.1).
To be more precise: the tablet in recovery mode is fine and nothing happens if i do nothing with it; however the screen starts flickering and the tablet reboots the moment I attempt to flash something, or even everytime I do a factory reset.
Now the situation has worsened: to simply put it, I can't no longer access the tablet with any rom, be it vanilla (touchwiz) or android-stock based.
What could possibly be the reason behind this problem? I guess it has nothing to do with software issues (i have the vanilla 4.4.2 installed right now, but it can't even finish the setup).
Is there any advice you can give me?
To be more precise, the flickering is not like there is some intermitting bright light or anything: it's like the tablet's screen turns off and on very quickly for 30 seconds, and then just reboots.
After a lot of tries, i managed to install the unofficial cm by temasek for note 10.1 2015, but the problem keeps popping up with every rom I tried.
Regarding the kernel I should have the default one, as i don't recall ever changing it or modifying anything about it, but I could check if some kind soul can tell me how.
The problem happens quicker and more frequently when the tablet is put to stress (for example, when i'm flashing something or when a Gapp is updating/intalling).
I thank you in advance
edelmiro11 said:
Hi all,
This is The premise:
My note 10.1 has been a good companion for an year and an half now, and i always kept it in good shape.
However, since december the battery just stopped charging as it used to.
To simply put it, it just took a lot to charge (as if the tablet didn't receive enough energy) and the battery drained at insane speed.
Not knowing what to do, and having a void warranty (i know, sucks, but with the vanilla p600 i coulnd't even open the pdfs i use to study, so it was useless to me ) I just had to bring it to a local repairman who is affiliated with samsung. They immediately ruled out the possibility of it being the battery, and they said it was probably something related to the simple connector, that they changed with an original one.
Now the real trouble:
After they gave it back to me, the tablet can't go 5 minutes without the screen flickering like crazy and then rebooting.
I tried different ROMS, thinking it could have been something related to the Ios. CM12, Hyperrom p600, the vanilla Rom that was originally in my tablet and so on.
The big problem is that this unnerving flickering and rebooting is not tied to the ROM, as it happens even when i'm just using TWRP (version 2.6.1.1).
To be more precise: the tablet in recovery mode is fine and nothing happens if i do nothing with it; however the screen starts flickering and the tablet reboots the moment I attempt to flash something, or even everytime I do a factory reset.
Now the situation has worsened: to simply put it, I can't no longer access the tablet with any rom, be it vanilla (touchwiz) or android-stock based.
What could possibly be the reason behind this problem? I guess it has nothing to do with software issues (i have the vanilla 4.4.2 installed right now, but it can't even finish the setup).
Is there any advice you can give me?
To be more precise, the flickering is not like there is some intermitting bright light or anything: it's like the tablet's screen turns off and on very quickly for 30 seconds, and then just reboots.
After a lot of tries, i managed to install the unofficial cm by temasek for note 10.1 2015, but the problem keeps popping up with every rom I tried.
Regarding the kernel I should have the default one, as i don't recall ever changing it or modifying anything about it, but I could check if some kind soul can tell me how.
The problem happens quicker and more frequently when the tablet is put to stress (for example, when i'm flashing something or when a Gapp is updating/intalling).
I thank you in advance
Click to expand...
Click to collapse
Sounds like a digitizer issue to me. A.K.A. Screen/graphics issue.
LiquidSmooth maintainer for d2usc/vzw & p600
Thank your for your answer:
could you be more precise? Bercause the touch screen and the lcd all look fine, and they are as crisp and reactive as ever.
the thing is that it looks like it goes in idle constantly and very, very quickly turns back on
Update:
so a local technician took a look at it for me and the hardware (lcd digitizer) seems totally fine, so i don't know if that is the problem.
Today somehow worked perfectly fine: no strange flickering, battery charging fine for once...
and then i tried to open the google camera
the camera crashed instantly and the hellish flickering started as it never stopped.
Should i upload a video? I feel like "flickering" is not an appropriate description

SM-N7505 Wi-Fi not turning on

Hi everyone,
I'm having serious problems with my Wi-Fi on my Samsung Galaxy Note 3 Neo (SM-N7505). Whenever I click the button to activate the Wi-Fi, the icon goes from grey to a dull green (darker than the bright green which signals that a function is turned on), as it does when it's trying to turn itself on. Problem is, instead of turning on, it just stays in that state for a few minutes before reverting to grey. This has gone on for a while, and I've already tried several possible solutions which I found after online searches. I don't think it's a hardware issue (see point 1 for the reason), and I really hope it isn't, because my warranty has been voided due to rooting, so I can't have my phone replaced or repaired unless I pay for it (which I can't at the moment). So, I'm basically ignoring the possibility of hardware failure and trying every possible software solution, hoping one of them will work, otherwise I'm just stuck with no Wi-Fi. These are the fixes I've tried:
1) Take out the battery while the phone is on, wait a few seconds, then put it back in and boot the phone up. This used to work when the problem first presented itself a few months ago (which is why I don't think it's a hardware issue), and I've been since using this method to fix it whenever it happened again. But a few days ago, this method stopped working for whatever reason, so I was back to square one.
2) I tried renaming the data/misc/wifi/wpa_supplicant.conf file, which seems to have worked for some people, but not for me.
3) I tried updating the version from Kitkat to the recent Lollipop, hoping that would fix it, but nope.
4) I tried deleting practically every single app one by one, hoping that one of them was interfering with the Wi-Fi somehow, but nope.
5) As a last resort, I tried a factory reset, but not even that worked.
This is basically the long and short of what I've tried to fix this... I might've skipped a few of the simpler fixes I tried (for example, I just remember I tried disabling "Smart Network Switch", which seemed to do it for some people), but the big stuff is all there.
I'd really like to get my Wi-Fi back, so if anyone could help me fix this thing I'd be really grateful!
Thanks in advance to anyone who will bother to reply.
same problem dude
Same problem...wifi and bluetooth not working...pls help us
Same Problem for me, Initally it works fine even after updating Official Lollipop update (OTA), but after few months now wifi & bluetooth are not working for me. And finally faced battery drain issue for past few days. Battery goes down upto 20% per hour even in idle condition. Then i rooted & installed Note Rom & even after i face the same problem. Is there any way to fix?

The slow death of my Note 4

Hello!
Everything was working fine until my phone started acting up about 6 months ago. The screen began to become unresponsive, apps crashed when switching between them and random reboots occurred frequently. I thought back then it had to be software related, so I completed multiple factory resets, and completely removed everything on my phone. It became slightly more usable, but these crashed and random reboots still occurred.
Last week, my phone continued to reboot, but a new problem occurred-it no longer would turn on after the reboot. I tried plugging it into the wall, pressing the volume down + home + power to force bootloader mode, but it wouldn't turn on at all. The fix was I had to remove the entire case, take out the battery and put it back in the phone. After that it would turn on, but only for a few minutes before another random reboot occurred and I had to remove the entire battery again. My phone is now virtually useless as I cant before even the basic functions, calling and texting without it becoming unresponsive or shutting off and not turning on.
I narrowed it down to the eMMC chip. I am almost certain that is corrupt, because during some of the reboots it would fail and throw me into download mode with the error:
mmc0_read_fail
or something along those lines. My last attempt at recovering the phone was to the stock rom PE2 with a PIT file (I had created before I started flashing custom roms). Each time I would attempt to flash with ODIN it would result in a:
mmc0_write_fail
However, I was finally able to get the PIT and PE2 firmware to flash. Now I have a half-working phone that will randomly reboot still and in order to turn it back on, the battery has to be pulled out for a minimum of 15 seconds.
New Issue I just noticed: When the screen turns off when the phone is inactive, it won't turn on again after pressing the power or home buttons. Only solution to this is once again, pull battery and hope I boot into system again.
I am pretty sure there is no fix to this problem on the software side, but let me know if you have a suggestion! Thanks!
Same situation. This thing is a lemon!
Sounds like hardware failure.
Replaced the battery yet? My original didn't last fifteen months before it started shutting the phone down. It's the first thing I think of when someone reports having to pull the battery.
Are you checking battery capacity before the battery pull by plugging in when it shuts down? Mine showed 0%. Before the shutdown, it may have indicated as high as 30%. It gets worse.
You didn't mention capacity when plugged so I thought I'd ask.
Sent from my SM-N910P using Tapatalk
One of my note 4 had same issue. Its a hardware issue. I was able to get the phone working by using a heatgun on the motherboard to try and reflow the solder on the chips. The phone works like brand new after the heatgun but the phone would only work for like 3 or 4 days before crapping out again. Ultimately ended up buying a used motherboard on ebay with a clean esn and its working perfectly again.
My wife's Note 4 started the random reboot thing and screen being unresponsive thing last week. She said it randomly started after installing Snapchat, so she uninstalled it hoping that would fix it. It didnt. I put a new battery in it thinking the original was bad, but still same issues. Then did a factory reset but that didnt work. After a lot of searching I stumbled on to someone who mentioned downloading an app called Wakelock. I did and phone has been running smoothly for several days now.
I also recently did the most recent update hoping that would fix the issue, it didnt but during the install I did get one error of emmc read failure or something like that. May just order a used/new motherboard just in case.
Just be careful when swapping out the motherboard as it essentially is taking apart the whole phone including the removal of the LCD.

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.

Random and untimely reboots

Hello everyon everyone.
I have the SM-P600 version, everything was good until the beginning of the week when touchpad began to go off without reason, and completely random.
I first reinstalled several official ROMs from the most recent to the oldest, with no significant improvement
Then i rooted and tried Lineage, it looked good for a while, but in the end same problem.
Please note, when the tablet begins to mess, the reboots are occuring more and more often and after a while it turns in a loop and im not even able to switch it off.
Samsung logo display, black screen, logo, black screen, etc ...
I think rather for a battery-side problem, if some people have faced similar problem, I'm taking help.
Do you know if by chance we can use the tablet without battery to test this theory?
Thank you in advance for any answers.
jb1207 said:
Hello everyon everyone.
I have the SM-P600 version, everything was good until the beginning of the week when touchpad began to go off without reason, and completely random.
I first reinstalled several official ROMs from the most recent to the oldest, with no significant improvement
Then i rooted and tried Lineage, it looked good for a while, but in the end same problem.
Please note, when the tablet begins to mess, the reboots are occuring more and more often and after a while it turns in a loop and im not even able to switch it off.
Samsung logo display, black screen, logo, black screen, etc ...
I think rather for a battery-side problem, if some people have faced similar problem, I'm taking help.
Do you know if by chance we can use the tablet without battery to test this theory?
Thank you in advance for any answers.
Click to expand...
Click to collapse
I think I'd be taking a close look at the physical power button. Seems to me that if it had gone flakey it could cause something like this.
marshallartsoz said:
I think I'd be taking a close look at the physical power button. Seems to me that if it had gone flakey it could cause something like this.
Click to expand...
Click to collapse
Hello and thanks for you answer,
Just to precise i never faced this issue while flashing an official or custom ROM, dont know if it is just luck or it can help in anything
Anyway ill try to check it the power button just in case
It's weird I just started having this exact problem myself. One morning I unplugged it and it had shut itself down overnight. Since then it randomly reboots. Sometimes I can get 20/30 minutes out of it, but once it starts, it can get into multiple reboots with the only way to stop it is to plug in the charger. I tried wiping cashe/dalvic (no help). Nothing was recently changed (including apps). Tried resoldering battery connector (battery was replaced a year or so ago with OEM Sammy). The P600 is rooted with TWRP installed, but no custom ROM. Usually the reboots start while I'm doing something (surfing, email, etc.), but I don't think it will do it while sleeping. I'm considering the power button, but I don't see this exact problem anywhere else, but this post. Any ideas?
OK. My tablet has taken a turn for the worse. Now it is stuck in a continuous boot loop. I tried the power switch, no help. I tried booting into TWRP, and it went back into rebooting before I could do anything. Strange thing is I can put it into download mode indefinitely without it rebooting. Should I ODIN back to stock? I tried the resoldering of the battery connection earlier. Any other ideas?

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