schematics above you not see ? https://vinafix.com/threads/hp-envy14-day31amb6c0.14293/page-2#post-70088
thanks before, but problem is still same. the screen is blank or very dim light. i have reball vga. can you share dump bios for this type? i copied all of the bios you provided above but i got black screen, no light at all.
lcd and inverter checked no problem. I suspect the problem exists on the bios. because I've experienced the same thing on a similar motherboard that is HP 14-v201TX DAY11AMB6E0 REV.E Flash bios of the same type (HP 14-v201TX) problem solved. previously flash bios of different types with the same kodeboard (eg HP 15-p248TX DAY11AMB6E0 REV.E) laptop screen actually even become dark. that is my experience I hope you can understand thanks a lot
graphic chip works properly, and tested with other bios that shows the image and video equipment without problems but the USB ports stop working.