[REQUEST] Unlock iGPU HD 4000 support in Flytech POS5000 (DS-5000-C69-F01, BIOS C69V

[haearn]

Hello,

I'm looking for help unlocking full support for the Intel HD 4000 iGPU in my industrial POS motherboard. Orignally I had G540 CPU and when I switched it to an i7-3770S the system passes POST, but I'm getting 8 beep codes due to missing or non-functional video initialization (no onboard video signal via DisplayPort).

Hardware setup:
- Motherboard: Flytech POS5000 (model on PCB: DS-5000-C69-F01)
- Chipset: Intel Q67 Express
- Original BIOS version: AMI C69VVR10 (C69V-056) from 2013
- Processor: Intel Core i7-3770S (with HD Graphics 4000)
- No discrete GPU (headless system)

What I need:
- A modded BIOS with Intel HD 4000 VBIOS (version 2170 or known compatible)
- Or guidance on how to inject the correct VBIOS (raw or Option ROM) into my BIOS region

Notes:
- I extracted my original BIOS via CH341A (attached) and opened it in UEFITool
- I wanted to insert CPUID and VBIOS manually but couldn't find a clean one
- I can flash via CH341A and test any image

If you can help with a clean mod or point me to a VBIOS dump known to work with Q67 and i7-3770S, I’d greatly appreciate it.

Thanks in advance for your time and support!