I would suggest doing a visual inspection of the capacitors in the power supply and on the motherboard first. If you have a good capacitor tester that will check for ESR, that's what I use just to make sure the caps are good. If they look questionable replace them. I normally load Each separate supply down with a 10 ohm 10 Watt resistor and run the supply. If you have a 20 W resistors it could be better, a little less heat, but still would load the power supply for testing. Mike R. Sent from: My extremely complicated, hand held electronic device.
On Dec 28, 2019, at 10:18 AM, Andrew Diller via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
This is helpful:
https://www.lifewire.com/atx-24-pin-12v-power-supply-pinout-2624578 <https://www.lifewire.com/atx-24-pin-12v-power-supply-pinout-2624578>
-andy
On Dec 28, 2019, at 10:05 AM, John Heritage via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
Hey folks,
I have a couple of old DOS/Win98 (OS/2) era systems that I came across, and they both have AT PSUs I want to check out before powering on for the first time.