M6700, eDP (to LVDS, RGB-MD).
P3000 boots to bios but not to Windows (stock VBIOS)
P5200 worked in LVDS, now doesn't work in eDP?? (VBIOS eDP issues??, modified VBIOS for M6800 laptop)
RTX 3000 works and boots to Windows (HP original VBIOS).
I'll test the RTX 4080 and see if it boots, I need to test it fast because not adapted heatsink.
Edit: RTX 4080 X-VSION. Works only in HDMI out. Boots to Windows. Didn't work in eDP, despite having the backlight mod cable.
Boots to HDMI out with backlight mod cable and by unplugging the eDP LCD cable.
What is wrong then?? The backlight cable mod works in Clevo P570WM3 and Dell precision 7720.
It's probably the interposer between the eDP cable and the LVDS display. The GPU didn't like and made the entire computer not post.