SM-T800 works only with power button pressed - General Questions and Answers

Hello!
A while ago I asked this: https://forum.xda-developers.com/t/my-sm-t800-will-not-boot-normally.4016731/post-82060775
and, after not finding anything, left it since then. Now I tried again and found that it actually even works normally - only I need to hold the power button all the time. As soon as I leave, the OS immediately crashes.
Any idea what this might mean and what to do?
Many thx!!!

Related

[Q] Ever get stuck in CWM recovery?

Has anyone ever gotten stuck in CWM recovery?? And by stuck I mean, making any selection just makes all the text/options/scripting-prints disappear and the only thing that's left is the background image of the green android guy standing next to the box with the arrow coming out. It just happened to me and I have no clue why. I booted into recovery, made a nandroid backup, and then went to restore a previous nandroid backup, and that's what happened. And after that, every single selection attempt just had the effect described above. So after 5 minutes or so, I tried holding down the power button. Held it for a good 30 seconds, released it, didn't seem to work, until about 5 seconds later it finally started to reboot. And then booted back up into android. I was freaking out for a bit there, so I'm wondering if anyone knows what happened??
Yes that has happened to me. I fixed it by pressing volume up or down button several times. It is some safety feature or something, scared the sh!# out of me too lol especially since I had done a factory reset right before.
Haha glad to see I'm not the only one. Just wanted to know that it wasn't anything to be careful of in the future. Thanks!
Did you try using the home button to make selections? For some reason, it has happened to me also. I freaked out, but tried the home button and it worked. The power button sometimes hid the text of the recovery, but idk why.
slotstik04 said:
Did you try using the home button to make selections? For some reason, it has happened to me also. I freaked out, but tried the home button and it worked. The power button sometimes hid the text of the recovery, but idk why.
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Yeah I actually tried every one of the softkeys. Nothing worked. They all had the same effect as hitting the power button. So weird.
same here, j had to hold power button for 20 secs and then reboot phone. I thought it was strange
Sent from my SGH-I727R using XDA
Yeah, this is a built in feature to cwm, if you press the volume buttons in an up down up down pattern a couple of times, you'll get a message saying "back button disabled" and you won't be able to select anything. If you go back and forth on the volume a couple more times it should fix the issue.
jomeister15 said:
Yeah, this is a built in feature to cwm, if you press the volume buttons in an up down up down pattern a couple of times, you'll get a message saying "back button disabled" and you won't be able to select anything. If you go back and forth on the volume a couple more times it should fix the issue.
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Click to collapse
Wow thank you for this! I know exactly what happened then. The case on my phone covers up the volume rocker making it difficult to push. And I must have been pressing the rocker right in the middle, because I did notice the highlighted selection go up and down a few times. And then I did, indeed, get the "back button disabled" message. And now I know if it happens again, how to get out of it. Thanks again.

Random Bootloop / Auto power-on / No download / holy crap

I think my Infuse crapped out on me. After about a week on Slimbean, while texting, my phone decided to shut off and start bootlooping. I sat there and was like... wtf
I tried entering recovery, couldn't get to it. I removed the battery and re-inserted it then another strange thing happened, it powered on by itself. Now I know something definitely going on. Tried getting into recovery for another 15mins and gave up. I then loaded up heimdall and tried entering download mode.... It doesn't work either! I've tried so many times too. What the hell is going on with my phone?! I was holding out until 2013 to upgrade because my infuse was doing well and I don't really like anything that's on the market right now. But with the recently announced Note II, I may find something extremely temporary and go to that, but main plan is to fix this and wait for 2013. So any ideas on what to do?
I had the same issue as you homie. Your power button is jammed. I had to take mine apart and clean out the power button. After I did that it wasn't rebooting by it self anymore. Or what you can do is when it turns on press the power button continuously until it stays on. Now I don't even touch the the power button at all. I use the power widgets to put it to sleep and I use the volume button to wake it up.
*Fi Mi JellyBean Gone Paro*
Yep...its the power button
Sent from my HTC PH39100 using Tapatalk 2
Opened up my phone and tried cleaning it, still same thing. Maybe the button itself is actually broken... Maybe I should desolder it...
Alright so it was the power button. I desoldered it and now the phone works... just without a power button. The only problem now is trying to flash a Rom via CWM. The home button doesn't work either, it just makes the menu disappear, as with the menu button as well. Is there another way to flash a rom Via heimdall or odin? I particularly would like to go the slimbean route but I need to flash ICS first. Any and all help would be appreciated!

Broken Power Button?

So I was using my phone earlier and the screen randomly went dark, as if it had timed out. I woke it back up with the home button, then same thing happened again about 10 minutes later. I figured my case pinched the button or something to turn it off. It turns out that now the power button shows no response, at all. No matter how many times or ways I push on it.
Did it just fry? Just like that? Any ways I could test to see if the button itself is the culprit or if it could be any other factor?
First thing I would probably do is Odin back to stock and see if it still doesn't work. If not, I'd say it's a hardware problem.
Sent from my SCH-I535 using Tapatalk 2
Boot into CWM recovery, and do a key test and see if the power button is seen. Its under advanced options. use the integrated menu in cwm. Also you need the touch version of CWM recovery. Because if your power button doesn't work you wont be able to select anything.
Kawirider1228 said:
So I was using my phone earlier and the screen randomly went dark, as if it had timed out. I woke it back up with the home button, then same thing happened again about 10 minutes later. I figured my case pinched the button or something to turn it off. It turns out that now the power button shows no response, at all. No matter how many times or ways I push on it.
Did it just fry? Just like that? Any ways I could test to see if the button itself is the culprit or if it could be any other factor?
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Click to collapse

Home button / Power button not working

This started a couple of days ago. Both power button and home button randomly stopped working. I thought it was a ROM issue, so I tried flashing another ROM (I was on stock/rooted). Tried 2 different ROMS and had the same problem with both of them. Flashing another kernel (arter kernel) didn't work, either.
I've noticed the power button works normally until I press the home button, which acts like a long-press (bringing up google now on tap or google now when I disable tap). After that, the phone doesn't recognize the power button.
I can apparently bring it back to work if I take a screenshot (home+power button combination).
Has anyone experience anything similar?
I have exactly the same problem, it seems after installing an APP. The app is already uninstalled on my phone. How did you fix it?
Thanks

Power Button finally died

Hello,
my power button finally died. Hard nor fast pressing didn’t work anymore, as it did before when this happend.
Then I noticed, when I plug in the power adapter while only pressing the volume down button it boots into the bootloader mode.
Selecting Start or Recovery and it shuts down.
Code:
fastboot reboot
doesn’t help either.
Because there are some files, I tried to replace the power button. But after removing the button it still does the same.
Are there some other possibilities to revive my old Nexus or just get the files?
Thanks.
I had the same issue with power button (first I just move it a little bit after taking nexus apart what helped for few months) but at last this also didn't help.
I went to unofficial mobile service and they did replace my power button and it works 4 months without problem. It cost around ~$30 so I think it was worth it cause I still have working phone. Now I use ROM which allow me to wake up phone with volume buttons just to use power button a bit less.
Had the same problem a year ago, went to unofficial service and they replaced it for about $10 and it's working like a charm since then..

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