First post, by PTherapist
This is probably a long shot, but I thought if anybody may know what it is, it'd likely be on these forums. Basically, I'm trying to test a motherboard that I'm not sure is even working anymore.
Ignore the CPU in the picture, this system originally had an Intel 486 DX4 100Mhz installed. I don't currently have that CPU to hand, as it needs it's bent pins repairing and heatsink/fan finding, so I thought I'd test it out with a spare Intel 486 SX 33Mhz CPU that I had - which may be why I'm facing difficulties.
When I power it on, I'm just getting a series of beeps - 1 long, followed by 3 short. It originally had all RAM slots filled, so I tried removing all but 1 chip and still encountered the same issue.
The front CPU speed indicator on the PC case also still displays 100, so I'm guessing some jumpers need altering - however not knowing what board it is nor having any manuals for it, I'm stuck.
The board has settings printed on it for clock speed, offering 20, 25, 33.3, 40 & 50, but I can't see anything relating to voltage and I'm not even sure this board will be able to accept the older & slower 5V CPU?