Black screenTry creating a file called autoboot.txt on NOOBS' / PINN's recovery partition.
It should just contain 1 line as follows:This should force the firmware to boot off partition 6 directly.Code:
boot_partition=6
If it won't, you might end up in a boot loop, so you'll have to power off and remove this file to recover.
You can change the `6` to the boot partition number of your other OSes (see installed_os.json) to see if you can get any of them to boot that way.
Maybe, some mismatch for GPU ROM, which reads boot stuff and firmware files?! The backup I've made is approx 1 year old and I was making system (Debian) updates during this period (including Rpi related updates) ...
Info I got via UART (from RPi power off state, we can see multiple auto reboots):
Code:
.Raspberry Pi BootcodeFound SD card, config.txt = 1, start.elf = 0, recovery.elf = 1, timeout = 0Read File: autoboot.txt, 17 (bytes)Read File: config.txt, 133 (bytes)Raspberry Pi BootcodeRead File: config.txt, 133Read File: recovery.elf, 800028 (bytes)Read File: fixup_rc.dat, 3145 (bytes)Raspberry Pi BootcodeFound SD card, config.txt = 1, start.elf = 0, recovery.elf = 1, timeout = 0Read File: config.txt, 133 (bytes)Raspberry Pi BootcodeRead File: config.txt, 133Read File: recovery.elf, 800028 (bytes)Read File: fixup_rc.dat, 3145 (bytes)Raspberry Pi BootcodeFound SD card, config.txt = 1, start.elf = 0, recovery.elf = 1, timeout = 0Read File: config.txt, 133 (bytes)Raspberry Pi BootcodeRead File: config.txt, 133Read File: recovery.elf, 800028 (bytes)Read File: fixup_rc.dat, 3145 (bytes)I see that autoboot was read by bootloader.
Totally out of ideas what can be wrong with boot process
Need more verbose output to dig deeper. I leave JTAG as the latest option 
RPi and microSD are not defective as I can install fresh OSes and they boot and work OK. I just want to preserve a lot of settings, configs I've made during years to Raspbian, which is not booting after microSD restoration.
Statistics: Posted by mrpib3 — Tue Apr 09, 2024 10:35 am