My power supply finally died. It was a 200w or 250w. I could not find another (of course) and purchased a 300W ATX power switching PS which has both 20/24 pin compatibility.
When I plug in the new PS the machine never boots, however the PS powers up and then begins “switching” immediately (running fast, then slow, then fast…). Simultaneously, the lights on the case and keyboard flash on/off in unison with the PS.
I have an older ATX micro generic MB with an AMD Athlon chip. I have scoured the internet for documentation and was only able to find basic specs. This is a 20 pin power receptacle on the MB.
I am thinking the case is the problem and not the MB. This case was setup to handle both AT and ATX MBs. When I upgraded to the current MB (way back when) and went to W2K and then WXP, the OS shuts down normally, but then the old “it is OK to now shut off your computer”
splash screen comes up afterwards and I must hold the power button until it powers off.
Any ideas or thoughts as to whether this is resolved by a new case or is it time for a new MB?