[Q] Samsung Tab 4 7.0 SM-T230NU won't restart. - Galaxy Tab 4 Q&A, Help & Troubleshooting

I am trying to fix my friends Tab 4 SMT230NU. It powers on just fine, but when I try to restart from the power button. It shuts down then never powers up again. I took the back case off, removed the battery for 10 minutes then plugged it back it and it powers on. As long as I don't choose the restart option it will power on and off just fine. I did a hard reset, clear cache, then reboot thinking that would fix it but being that a reboot is the same as restart I get the same result. It does the system restore. I tried OTA to the newest firmware which fails at the reboot. Tried Kies with the same result. Non-Rooted Tablet. I tried ODIN with the new firmware, which worked on another 230nu tablet, that was stuck in a boot loop, but no luck with the one Im working on for my friend. Screen is cracked could that be the problem? Is the motherboard just jacked? Loosing hair over what I think should be a simple fix.

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Random reboots and won't power off.

So here's the story.
I have a Note 3 I acquired that was in pretty rough shape. According to the person that gave it to me, they had tried to flash a rom that was unstable and crashed the device causing a boot loop he couldn't recover from. So he reported it lost and got a new one.
The first thing I tried was installing stock firmware using odin. This at least allowed the phone to fully boot up. But, it would still restart after about 10 mins of usage. The next thing I tried was flashing TWRP on to the phone and doing a complete wipe of the phone. Then I flashed the stock firmware using odin.
This has brought the phone more or less back to a usable state. However, there are new problems.
The phone reboots at random. Usually after being on for an hour or longer. Also, the phone won't power down. When I long press the power button and select power off, the screen shows that it's powering down. The phone stays on the power down screen for about 2 mins then the phone reboots.
I've tried a factory reset and reflashing the stock firmware.

Sm-g900f (uk) galaxy s5 - arrgghhhhh

Can anyone PLEASE help??
My partner opted to do a suggested update on her S5, but didn't notice the wifi was off. The phone seemed to have done the update, but shortly after it rebooted itself, then again, then again. The frequency of reboot got quicker and quicker and now it loops between the Galaxy S5 splash screen and the SAMSUNG logo, but doesn't go any further.
I managed to boot the phone into reset mode, cleared the cache and then did a factory reset, but that did nothing to prevent the boot loop.
I then downloaded Odin (ver 10.3.7) and what I believed to be the correct firmware (G900FXXS1CPLV_G900FVFR1CPJ1_G900FXXU1CPIW_HOME.tar.md5).
Having checked the battery was charged, I followed the instructions of connecting the phone via USB, loading the md5 in the AP, checking Auto Reboot and F-Set time in the options and clicking the Odin Start button. I had removed the battery, replaced it and then booted it into the update mode (Power, Home, Volume Down, then volume up) with the screen confirming I was in the right place (....do not unplug.... etc).
The file loaded, (green bar at top of the Odin window on my PC) and Odin reported success. I then disconnected the phone, booted in recovery mode, reset the cache and then did a clear data, factory reset.
The same symptoms prevail, STUCK IN BOOT LOOP!!!!
The only thing different is that if I plug it into the USB on my PC, after a while the phone tries to turn itself on and goes into either a boot loop or freezes on the Galaxy S5 Splash screen or the SAMSUNG Logo.
I am charging another battery (just in case that is in some way to blame) and will try again to replace the firmware, but could I be missing something, do I need to do anything with PIT (I thought this was all taken care of by Odin using the MD5 file) or is there some other test I can perform that will show if the phone is fried???
MANY THANKS for looking!
ur going correct, try to reflash it again through odin and dont disconnect phone until it boots into system, it is taking some good time, so just wait and dont do anything this time like clearing anything or restoring. i hope ull get success.
THANKS - but...
Thanks Rayzen, I will try the whole thing again, but I think there is something more to this than a firmware fault!
There and gone again
OK, so on the 4th attempt I got the phone to take the firmware using Odin, it reported success and the phone rebooted itself (several times) and eventually appeared to boot to a new factory reset.
I put in a SIM card and entered my email and google account details and left it charging over night. This morning when I tried to use it, the screen froze and then it rebooted itself. Hey presto, the phone is back to square one with a boot loop.
ANYONE (please) got any suggestions?
THANKS
No one??
same here, same symptoms, same feeling.
when flash gone right... i feel lucky.. but for half hour only, rebooted and angain in boot loop.
I cannot even boot in recovery. flashed TWRP. from 5 boots in recovery only 1 success.
When trying to wipe phone in TWRP - it hangs.
still trying to install some other (custom) rom. still no success.
hope never dies
same things happened here! now cant get samsung galaxy s5 to boot...............
Are you sure your using right firmware? as it took me a few versions before it booted last time this happened?
Could any please confirm what is the right firmware for samsung galaxy s5 900F
It took another 6 or 7 attempts, left it over night and was about to trash it when it booted.
I then received a 'software update available' message and tried installing it. First attempt put the phone back into boot loop so I reflashed it again using Odin.
That worked immediately the over the network software update installed and now phone is 100%
Very frustrating but I got there!
glad you fixed it! ive tried three different firmwares and still nothing.
trying this one atm
G900FXXU1ANE2_G900FEVR1AND1_G900FXXU1ANE2_HOME.tar
oh and how long do they take to boot when there are sitting at the samsung glowing screen?>
I'm in UK and used what (I had to guess) was the best firmware.
I'll let you know which version it was when I get home tonight.
BUT I had all the problems with a single version and it eventually came good.
I read somewhere that overwriting a different core (from specific providers) with generic firmware, could lead to a world of pain until it gets full replaced... not sure if that's a good description (or has any fact to it) but it seemed to be re-loading and re-loading and re........ for ages, finally cracked it.
well mines booted now!but getting constant errors about samsung push!
If it'still booted, you'very made progress!
Push issues are mentioned elsewhere and can (eventually be sorted) but if you have a booted phone you should be able to get an over the air software update installed from the service provider....?!

S7 Edge crashes and reboots at Samsung logo, hardware or not? [All Stock]

Im so lost with this, im all stock but one day my phone just freezes then bootloop, I would be able to get it work by just leaving it and let it drain itself since it will be boot looping and lock me out completely, like the power button + low volume button would not work even after 10 minutes of holding it, would not boot to download or recovery mode, just the soft touch keys light on and the blue LED.
I reflashed my ROM from sammobile yesterday but did it half-effort, just dirty flashed it but it seemed to reformatted my phone anyway, after reflashing it, everything seemed to work properly for 20 hours and then now im back to this piece of ********* boot looping...
S7 Edge
running the Australia unbranded XSA-G935FXXS1DQG4 from the branded G935FXXS1DQG5,
would flashing de-branded affect this? or this is hardware?, one thing I did that I think was a mistake is that I chose to restore from old device, can apps cause this?
the very first time this happened, I plugged it in to charge then crash and bootloop.
UPDATE:
Things I've tried,
-Booting with NO sim card and SD Card
-Wiping cache and partition then reflashing stock XSA and OPS firmwares
im convinced that this is a hardware issue and will go to Samsung.
mine does this too. crashes then gets into a bootloop at the Samsung logo. I usually try holding the lock and volume down button. I factory reset the phone once but it still keeps happening, this started happening around 4 weeks ago
Guys your Main/Mother-boards are broken.. u need to replace it, or send back to Samsung..
Damn! Crash reboot samsung logo
Damn you say broken mother board...
did this. Press vol down, power button and home key...hmmm... i think...pressed so many combos hard to tell themapart

S8 Bricked :(

Hey
I'm having this problem with my S8. I was scrolling through Instagram when my phone suddenly froze and shut off about 10 seconds after. Tried to restart and do a hard reset ( Vol Down and Power), nothing worked all day. No charging LED when plugged in, nothing.
However, I came home and plugged it into my PC and it started charging. Got to 25% before i turned it on. Worked fine. I attempted to do a factory reset just in case it was bad software. When i did the factory reset, it restarted and said installing new software and gave me the "No Command" error and now i have the same problem as before where it wont turn on.
I downloaded fresh software from Sammobile and have Odin installed and ready to go but i cant get the phone into DL mode. HELP!!!
clsheppard said:
Hey
I'm having this problem with my S8. I was scrolling through Instagram when my phone suddenly froze and shut off about 10 seconds after. Tried to restart and do a hard reset ( Vol Down and Power), nothing worked all day. No charging LED when plugged in, nothing.
However, I came home and plugged it into my PC and it started charging. Got to 25% before i turned it on. Worked fine. I attempted to do a factory reset just in case it was bad software. When i did the factory reset, it restarted and said installing new software and gave me the "No Command" error and now i have the same problem as before where it wont turn on.
I downloaded fresh software from Sammobile and have Odin installed and ready to go but i cant get the phone into DL mode. HELP!!!
Click to expand...
Click to collapse
hold down volume down,bixby,and power together until screen comes on and let go of power button thats it

S7 Edge crashed - has my phone bricked?

Hello Community!
Hoping you'll be able to help me with this: recently my S7 Edge has been fairly unstable, crashing and restarting itself. Sometimes the reboot would fail, and it would loop restart until successfully launching. Today, however, it has seemingly crashed but the phone has done nothing since - it has not attempted to reboot, and power + vol down, and power + home + vol up aren't doing anything. The screen is black, and there are no LEDs showing. I tried plugging it into a charger, but that didn't give any LEDs either.
How can i get my phone on again? Thanks!
stock or custom? odin or just pc dont recognise it?
wifes phone just had same issue. stock updated to latest September update that rogers pushed down today it rebooted on its own a bunch of times and now wont turn on....like nothing.
i was getting the failed to find /misc a bunch then i tired clearing cache but still had issues
now i was going to try to do a factory reset but it wont boot.

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