Okay, still with the power off, and still with the multimeter set to the 200 ohm resistance range. Now test between the following pins of the PSU DIN plug:
1 to 2
2 to 3
3 to 4
4 to 5
Report back your results.
Does your multimeter have a diode test range?
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All the following tests are to be done with the PSU and computer disconnected from the mains supply. Switch your multimeter to the 200 ohms resistance range. Test this is working by touching the probes together, the meter should indicate around zero ohms or just above (0.1 to 0.9 depending on the re...
OK I went for it and masked all but pins 5 and 2 which gave me a reading of 23.6, which I think is what I should get. SO I assume the PSU is OK then. Tomorrow I'll have another go at removing the board for inspection. Steve.. If you can remove the keyboard and the video board, then (for some tests)...