First post, by JonF
- Rank
- Newbie
486-VIP-IO
I pulled this motherboard out of my storage bin recently and it’s not working. I’ve done some troubleshooting but no luck yet.
-486 DX2 50mhz, 16mb FPM RAM stick
-No video, no beeps
-ISA slot check card shows 4 dashes for error codes. Voltages on ISA bus are OK. Clock flashes intermittently. IRDY flashes once shortly after power up then nothing. Frame stays light. Reset LED is off unless I short reset button pins then it lights.
-CPU, RAM, video card tested in other machines.
-Tried other Ram, cpu, video combos and still nothing.(updated jumpers for cpu)
-CPU VCC pins are 5V, clock pin seems to get a signal.
However CPU reset pin is stuck high-I think this isn’t normal?
I tried erasing and reflashing the Award BIOS EPROM with a matching .bin file online but that didn’t change anything.
Any ideas or troubleshooting guidance? Attached picture of board test setup.