Re: Unkown red pcb AT mainboard Model "M54PS"
Posted on 2022-12-08, 08:01
Have you tried changing the JX1 and JX2 jumpers ? There are only 4 combinations. Are you using a heatsink ? Yes i had tried all possible combinations. I tested also another P 75 Mhz cpu but no change. For this picture i don't used a heatsink but regular yes. I measured with the osci some standard …