Boot loop. No Recovery but Download mode - Galaxy S 4 Active Q&A, Help & Troubleshooting

Hello,
this is my first post on here and I am sorry for it being a "Help me" one.
So yesterday I found my S4 Active again and I remembered it having problems booting up and being stuck in a boot loop. So I powered it on and it worked fine (exept for the lower halve of the touch screen not working, but I think that's another Problem). So I took out the battery. A couple of hours later I tried turning it on again, but this time I had the same Boot loop. When I insert the battery nothing happens (so no stuck Power Button). If I then press the power button it turns on. After the Samsung Logo it goes black for a while but the Backlight is on. After this it shuts down then turns on again but only for a short Moment (no Samsung Logo visible but it vibrates). Then it turns off again and turns on again and flashes the Samsung logo and so on. If I try to Boot into Recovery mode, sometimes it enters Recovery for a second and then turns off and on again but most of the time it just turns of after the Samsung logo and shows the same behaviour as described above.
I am able to enter Download Mode though. If I go into it and press down (to Abort Download Mode) it goes into Boot loop. If I press volume up I am able to flash through Odin ( I did this to flash the stock Rom 5.0.1 again, but it did not help at all). I also noticed that if I attach the phone via usb to the computer but no battery is inserted, the Backlight flashes every 2 seconds or so.
So does this look like a Hardware defect or is there any hope for me.
Thanks

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My Redmi Note 4X doesn't start now. It just keeps on vibrating and then restart itself. It doesn't even show the MIUI Logo. I can't even boot into Recovery (because it restarts) any fix or workaround about this?
Its just black screen. And only vibrates every time it shuts down. And it is looping. Vibrate > Black Screen (NO MIUI) > Vibrate > Repeat
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Press power+volume button for more than 10sec and your device will boot into fastboot . Then you can flash your device using MiFlash Tool.
Like I said I can’t boot to FastBoot neither Recovery because it just keeps on blackscreen and vibrates once and will restart. And it will repeat until the battery is out.
Just relaxed the phone for 1 and 2 hour then try to boot on fastboot mod.(not while charging)
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PLEASE HELP
Is going to take forever for this battery to drain and the unit shut off so I can try to boot into recovery or download mode...
HUGE thanks in advance
Hi! I got this problem too!
I was following guideline in this thread https://forum.xda-developers.com/galaxy-note-9/how-to/guide-change-note-9-csc-easy-guide-t3879473
I was following the procedure, but in very last step while flashing new firmware something happened to ODIN, it failed to flash it. I tried to restart the phone, but it entered KERNEL PANIC UPLOAD MODE. I was trying to get of this, but I was only able to enter recovery mode which didn't work properly either. It was indefinitely looping between installing update screen and other screen with error messages.
If I try to Volume down power for some time, I get POWER RESET OR UNKNOWN UPLOAD MODE.
So, no way out to get into download mode again.
Hi ckhaustralia, did you end up getting some help or an answer about the kernel panic mode issue with uour Note 9 problem you listed above? I have the same exact issue, except the reason why the firmware flash failed in my scenario was due to the charging port which I believe had a faulty sensor because I got a message half way through the flash indicating there "moisture" in the port. Now no matter what I have tried, I cannot boot into download mode to try and fix it. I think the only possible way would be to use something like a ZX3 box but it would be great to hear from someone knowledgeable within XDA?

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similar issue.
Constant boot loop, cannot turn it off. Can access boot options, even using the shutdown from that menu fails and returns to boot loop.
The notification led is on at max brightness, not flashing, just on. Won't turn off.
I DID manage to get to Odin (holding Vol Up, Home, Power, does not work every time), was able to successfully flash the stock firmware. (Which I was already on, Verizon Note 5 so no custom roms for me), didn't help. Once it finished right back to infinite boot loop, with no recovery mode or ability to turn it off.

M21 logo loop, can't access recovery

My mum tried to do the last update on her phone, during which most probably battery ran out - now phone is basically a brick.
When turned on it's stuck on logo loop, rebooting itself every 5-10 seconds or so vibrating once and repeating. When unplugged or plugged into the wall none of the button combinations work - the phone basically ignores everything.
When plugged to PC via USB I can invoke "updating process"? with Volume Up + Power / Volume Up combination, which should lead me to recovery menu - instead the phone goes into "update", loads bar up to 25%, gets stuck for about a minute or so, reboots and goes into logo loop.
Hard reset also "works" when plugged into PC - update screen shows up, gets stuck on 1%, phone gets hard rebooted, update comes up again, goes up to 25%, reboots and on to the logo loop...
Can I even somehow get into recovery mode to wipe cache to allow the phone to get update again or even wipe data to flash custom ROM? Screw data, I just want to make it work and not have a brick lying on the desk...
UnableToSee said:
My mum tried to do the last update on her phone, during which most probably battery ran out - now phone is basically a brick.
When turned on it's stuck on logo loop, rebooting itself every 5-10 seconds or so vibrating once and repeating. When unplugged or plugged into the wall none of the button combinations work - the phone basically ignores everything.
When plugged to PC via USB I can invoke "updating process"? with Volume Up + Power / Volume Up combination, which should lead me to recovery menu - instead the phone goes into "update", loads bar up to 25%, gets stuck for about a minute or so, reboots and goes into logo loop.
Hard reset also "works" when plugged into PC - update screen shows up, gets stuck on 1%, phone gets hard rebooted, update comes up again, goes up to 25%, reboots and on to the logo loop...
Can I even somehow get into recovery mode to wipe cache to allow the phone to get update again or even wipe data to flash custom ROM? Screw data, I just want to make it work and not have a brick lying on the desk...
Click to expand...
Click to collapse
Have you tried using reiboot-for-android.exe by Tenorshare Co Ltd? Might help. Or if the device is within warranty then try Service Centers for that device.
You can try flashing stock rom from odin.
Download your current stock rom from samfw.com and extract the zip file.
Install odin and samsung usb drivers (link) and reboot your pc.
Reboot into download mode from your phone and press volume up:
Keep USB connected, Hold Volume Down and Power buttons, When screen turns off, hold Volume Up and Volume Down buttons
Click to expand...
Click to collapse
Open odin and load the files:
AP = AP*.tar.md5, BL = BL*.tar.md5, CP = CP*.tar.md5, CSC = CSC*.tar.md5
Click to expand...
Click to collapse
Click flash and wait till it says pass
Press and hold volume down and power to reboot. The first boot can take a while. Hopefully this will fix it.

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