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Old 19th Sep 2018, 10:22 pm   #30
Dual Standard
Hexode
 
Join Date: Aug 2005
Location: Cheshire, UK.
Posts: 263
Default Re: IBM PS/2 seems to have got stuck!

Quote:
Originally Posted by bluepilot View Post
What happens if you switch on and then immediately keep pressing the reset button?
Alas the PS/2 model 30 doesn't have a reset button, just a power on switch

Quote:
Originally Posted by IanBland View Post
So try just turning on the PSU with nothing connected to it, and in theory if it keeps running it is okay, and if it doesn't it is defective. Pin 1 should switch to 5V within a very short time of switching on.
While I can't be 100% certain with this specific power supply, many IBM switch mode power supplies will not produce an output without some kind of load connected so trying to measure the voltages with it disconnected from the systemboard may well be futile.

Mike
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