I normally test PC power supply faults by just swapping parts, I thought I would try and test with a meter after reading an article.
The PSU is a 250w ATX with the 20 pin connector.
I shorted the connectors 'On' with the 'Ground next to it and swithched on - fan starts.
I then placed the red lead of a test meter (set to ACV) in say the 12v pin hole, the black lead on a ground - reading 24.3v
5.5v pin hole - reading 10.8v
3.3v pin hole 6.8v
The meter has two ACV settings 600 and 200, I was using the 200.
Can someone please explain what was wrong - by the way I tried this on a 400w ATX and had the same problem
The PSU is a 250w ATX with the 20 pin connector.
I shorted the connectors 'On' with the 'Ground next to it and swithched on - fan starts.
I then placed the red lead of a test meter (set to ACV) in say the 12v pin hole, the black lead on a ground - reading 24.3v
5.5v pin hole - reading 10.8v
3.3v pin hole 6.8v
The meter has two ACV settings 600 and 200, I was using the 200.
Can someone please explain what was wrong - by the way I tried this on a 400w ATX and had the same problem