[vcf-midatlantic] Old AT power supplies - how to test?

Sentrytv sentrytv at yahoo.com
Sat Dec 28 11:40:09 EST 2019

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 at 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 at 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.

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