TOSHIBA L855; PCB : DK10FG-6050A2491301-MB-A02 ; no video

[mhp666]

I have this pcb and it doesn't give video.
The notebook starts perfect but without image.
I upload the BIOS.

[peste]

Re: TOSHIBA L855; PCB : DK10FG-6050A2491301-MB-A02 ; no video

try..

[mhp666]

Re: TOSHIBA L855; PCB : DK10FG-6050A2491301-MB-A02 ; no video

try..

Continue with the same symptom.
It does not appear to be BIOS.
If I find out the problem, I explain what it was.
Thank you.

[SMDFlea]

Re: TOSHIBA L855; PCB : DK10FG-6050A2491301-MB-A02 ; no video

Try this bios https://www.badcaps.net/forum/attach...5&d=1517081819

[mhp666]

Re: TOSHIBA L855; PCB : DK10FG-6050A2491301-MB-A02 ; no video

Solved !!!
The BIOS that I have uploaded and the one that the partner has set are good. The others are 8 mb and I have not tried them.
It was a problem with the graphics chip.
Thanks for your help.

[junjuntech]

Hello. I need help with a BIOS mod for my Toshiba Satellite L850.

- Board model: DK10FG
- PCB part number: 6050A2491301-MB-A03
- BIOS chip: Winbond 25Q64 (8MB)
- Original GPU: AMD Radeon — already physically removed
- Symptoms: Board powers on (fan, LED, Caps Lock working), but no display via internal screen or VGA.
- I confirmed the short was on the AMD GPU and it's now removed.
- I suspect BIOS is still locked to PEG (discrete GPU), and does not fallback to Intel iGPU.

Please help me modify the BIOS to:

1. Force `Primary Display = IGD` (Intel graphics only)
2. Disable PEG graphics
3. Disable Switchable Graphics (optional)

I can flash the .bin file back using CH341A.

Thank you!