Pinebook Pro malfunctioned hardware

[samtux]

You don't say if you updated the kernel
If the led turns on, whatever color, then uboot has loaded,
with no uboot,,, no led
It is not clear exactly when the backlight led turns on'
most uboots display nothing (& no backlight) , only the most recent uboots and tow-boot
Since, implicitly, this was not happening before, sounds like a kernel upgrade to me
If you have a previous kernel, I would manually rollback,,
ie edit extlinux.conf and do renaming in boot, make sure initrd and dtb match

Hi,
thanks for your reply.

the fist line on the boot screen is "u-boot 2022.04 (may 10 2022 - 09:01:16 +0100) Slackware" (see Photo below) and the backlight LED turns on right before the first lines appear. in this state LED is orange and then this screen disappears and the there are colored vertical stripes on the whole screen and after 2 seconds or so it switches black and then the kernel boot messages appear and the LED turns green. 

Now also the NVMe controller stopped working, so to check what was installed on the last update, I had to take out the NVMe and here's the list of the newest packges:

Code:

$ ls -lhtr /run/media/sam/SLKroot/var/log/packages/ | tail -n10
-rw-r--r-- 1 root root 1,2K Okt 24 21:55 perl-LWP-Protocol-https-6.10-aarch64-1_SBo
-rw-r--r-- 1 root root 1,2K Okt 24 21:57 perl-JSON-4.02-aarch64-1_SBo
-rw-r--r-- 1 root root 1,4K Okt 24 21:57 perl-data-dump-1.25-aarch64-1_SBo
-rw-r--r-- 1 root root 3,0K Okt 24 21:57 pipe-viewer-0.1.8-aarch64-1_SBo
-rw-r--r-- 1 root root 2,1K Okt 26 18:03 svox-1.0+git20130326_8-aarch64-2_SBo
-rw-r--r-- 1 root root  900 Okt 26 18:03 picospeaker-0.6.2-noarch-1_SBo
-rw-r--r-- 1 root root 1023 Okt 26 18:19 emacspeak-53.0-aarch64-2
-rw-r--r-- 1 root root 192K Okt 26 18:22 emacs-28.2-aarch64-1
-rw-r--r-- 1 root root 3,4K Okt 26 18:31 flite-2.2-aarch64-1_SBo
-rw-r--r-- 1 root root  634 Okt 26 18:31 eflite-0.4.1-aarch64-1_SBo

I also have two RK3399 SBCs from Radxa , also running Slackware-aarch64 for about 2 years now and the output at boot time is equal to that on the pbp, only the LEDs are different and there is no Slackware logo but a u-boot logo. 

The noise started while downloading packages for the update.