Got the CH341A programmer at last… Put my original.rom on the chip with the programmer, verify goes ok but still black screen.
And now I have a feeling that I have tampered the wrong chip ALL THE TIME! This 25Q80C chip has 1 meg of memory and all the bios files are 8 meg size. The other chip is GD25LB64CW1G and it has 8 meg memory.
GD25q80C is located near ITE-superio chip and the GD25LB64C is near CPU.