HP 15-cb002ng no picture after CMOS reset

[REpairAT]

Hi,
I have a strange fault with this notebook, MB Nr. is
G75A DAG75AMBAD0 REV: D

Backlight goes on, but no picture. Caps blinking 5x long, 3x short, meaning
"This condition indicates the embedded controller cannot reach the BIOS within the established time limit" regarding to HP

Whenever I unplug battery and charger, message "CMOS has been reset..." after hitting enter, again, only backlight, no picture and Capslock blinking.

I tried to clear ME already, no changes (original dump attached)

Any ideas?

[Aditya11ttt]

Re: HP 15-cb002ng no picture after CMOS reset

test and report

[REpairAT]

Re: HP 15-cb002ng no picture after CMOS reset

test and report

No POST or backlight at all with this bin.

BR, Ray

[hoaca388]

Re: HP 15-cb002ng no picture after CMOS reset

No POST or backlight at all with this bin.

BR, Ray

HP Pavilion Power - 15-cb002ng

[REpairAT]

Re: HP 15-cb002ng no picture after CMOS reset

After leaving it running and turning off/on again multiple times, both files above stuck at "Flashing Boot Block 53%"
I assume, there's another problem with the mainboard. I read some issues with an XTAL causing this caps blink error, but on another model. Anyone has an idea?

BR,
Ray