[Q] Nook does not boot. - Nook Color Q&A, Help & Troubleshooting

I ran Cyanogen app and when it said there where a new version, I selected this and downloaded.
The application would like to restart to continue install.
Now I'm stuck.
The unit dosn't boot.
I have searched the forum but must problems handles stuck in boot.
My unit dosn't show anything.
Is there a reset / master reboot / override power on?
I have a SD card that boot into recovery and flashes ROM without problem. If I only could get the unit to start :-(

http://forum.xda-developers.com/showthread.php?t=949699

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[Q] Spica doesn't turn on

I had Cyanogenmod 6.1.1alpha8.1 on my spica. Recently it got a little bit laggy so i decided to flash it with odin to restore the original firmware and install everything else from the beginning. I tried to flash it with I5700XXJH6. The flashing went fine, but when spica started booting, only the first, static bootlogo showed up and there was even no progress bar. After 20 minutes nothing had happened so i tried to flash it with 1.5, then install Lk10 to get into recovery mode, so i could get access to the phone's shell. Unfortunately, after flashing everything was the same - static bootlogo and no progress bar. Installing LK10 went fine, but the phone still wouldn't boot into recovery mode. I tried many different ROMs and one of them worked - the system booted properly, everything seemed to work at first glance, but when i inserted the SIM card and input the PIN code, the phone got stuck on "Unlocking SIM card". I tried rebooting many times but it didn't work.
Once again i tried to flash it with odin and everything was the same as before. I tried a few times, but now there's no download mode and when i connect the phone to the charger, nothing shows up on the screen.
Is there anything else i can try to do?
i had and solved the same issue yesterday.
I think part of the issue is maybe with a previous FileSystem conversion and another part with data/cache from previous Roms.
Try to make an install as clean as possible.
- I5700XXJH6 with Odin
- LK2.08 with odin
now you have an acessable recovery.
- boot the phone and put the CyanogenMod 6.1.1 alpha8.1 (found on 'forum dot samdroid dot net') on the root of the sdcard.
- shutdown the phone.
Important: disconnect the phone before booting in recovery, else it will boot normaly.
- boot in recovery (Volume down, accept call, on/off button)
- apply the downloaded zip.
reboot normaly, if it loads normaly, yay!
If it doesnt load (wait 5 mins to be sure) pull out battery.
reboot in recovery, and wipe data/cache (factory reset)
reboot normaly, if it loads normaly, yay!
If it doesnt load (wait 5 mins to be sure) pull out battery.
reboot in recovery, and make sure data,cache and system are rfs.
to change it to rfs 'advanced>filesystem conversion'
reboot normaly, if it loads normaly, yay!
if not send me a PM.
I already tried installing I5700XXJH6 and LK2.08 but neither the system nor the recovery mode would load - only the first, static bootlogo showed up. I can't try again because the download mode doesn't work any more and when i connect the charger, the screen remains black.
As I wrote in the first post, i managed to get it working once, but it had problems with the SIM card, so i tried different ROMs, which seems to have broken my spica entirely.
Is there anything i can do to restore the download mode?
im assuming you tried starting downloadmode without it being connected to a pc.
I dont know how to restore downloadmode, perhaps the guys at the samdroid forum can help you out.

Trouble flashing marshmallow roms

Hi all
I'm using a snapdragon n10g note 4. Whenever I finish flashing any android 6.0 ROM(with factory reset and everything) I get the following problems:
The phone shuts down at the boot screen-while the boot animation is playing. Not restarting or anything,it just shuts off. I can try to turn it on again but it just shuts down again.
Then, in the rare occasion that it DOES boot successfully, I get a "no sim card detected". And I can't really reboot to try and solve it because the first problem will show up again...
Have googled a lot but didn't find anything. Thx in advance.

Nexus 7 2012 - black screen - HELP

My nexus is dead. The tablet has hung up. Restart did not help. After turning on the Nexus Tool Kit and trying to upload a clean system - ended with errors. I tried to format the userdata and re-mount and install roms. However, it did not happen. The tablet does not start. Recovery / bootloader does not work. Powe + volum combo does not work. Black screen. After connecting to a computer - apx device only.
Did I break the bootloader?
Can I fix it? What tools do I need?
Same problem here.
This situation happend with me:
I make a hard reset for tab. And on loading stuck at loading apps 76 / 120 and i shutdown my tab and reboot but not showing screens. Recovery, bootloader and other things not worked.

NR5210 NEWSMY CADPAD III probobably brick. HELP!

Hallo everybody,
i have a rpoblem with may CARPAD III NR5210.
IT's a RK3188 with STM32 chip. I try to flash XDAUTO rom, it works. Monday i reflash because i don't flash with clear system and some error appears. During the proced i wipe all (system, data, etc..) but the battery broke down.
Now i can't put it in recovery mode. Even start teh boot logo XDAUTO in sreeen.
I try to push reset button, one time, two times, for 20 seconds and more, but notting works; boot logo appares in the screen.
I try to disconnect to battery of the car for a night. No works, boot logo starts.
I try to put 5 fingers in the screen during the start, no works, boot logo starts.
i try to connect the OTG port in my PC to flash with RKTOOL, but the unit isn't recognized (it's works 2 month ago).
it's seem brick ;( ;( ;(
Only procedure that seem work is SD BOOT procedure. I try whit the SD BOOT procedure that i found in internt for PX5 MTCD unit, and no boot logo starts... only a illuminated black screen, but nothing appares becouse i think i don't have the right software into the SD.
Please, help me.
Many many many thanks
Some one have some procedure that can halp me?
Please, i don't know no other way to resolve this ptoblem.

PX6 stuck in boot loop

Hey!
My head unit is stuck in bootloop. It's an xtrons Android 10 PX6 unit MTCE_GS_V3.67_3 (Nov 7 2020).
I tried to flash Hal9k with the modinstaller downgrading to Android 9. Got stuck in bootloop.
That can happen. So I went back to Android 10 again and installed CHS2_RK3399_10.0(20200424)img via SD - stuck in bootloop.
I have access to recovery though and tried wipe cache and factory reset.
I tried to find help in old threads, pressed with 5 fingers on the screen during boot-up, and tried tapping on the screen.
The unit is connected to a DC power supply on my desk and I always disconnected power between all tries. No success.
Any more ideas?
Thanks for your support! It's well appreciated!
I have a similar issue with Ownice C800 PX6 rockchip 3399, i changed an option on the setting to have it default to off instead of On, after it rebooted nothing shows up on the screen. i can access the recovery menu and did a factory rest and nothing happens, i installed
Malaysk ROM for PX6 RK3399 with Android 10 and the update was successful but still no boot at all, the recovery log shows failure to create file in memory. not sure if the setting made the memory protected and why the boot is failing.​
My apologies previous threaders I cannot fix your bootloop, but have similar problem.
Question to bluefreak, how did you get into recovery mode?? from a bootloop??
My original item is a 4gb ram 64 gb rom, px6 unit, previously I put a russian rom flashed via update to system on it, I think I paid 20 usd for it and it worked a treat until my son used the car, several years past warranty. And it has gone into bootloop.
I think the flashed rom was Malaysk?? I may be wrong.
I have a reset button, held it in for a minute still bootloop, connected another rom via usb and it will not flash, just bootloop. I have also attempted many methods from google and youtube.

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