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|    comp.sys.ibm.ps2.hardware    |    Discussing IBM PS/2 hardware    |    42,985 messages    |
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|    Message 41,183 of 42,985    |
|    Pertti Helander to All    |
|    Re: My IBM PS/2 8595-AKD missing power.    |
|    10 Jan 23 05:41:15    |
      From: pertti.helander@pp.nic.fi              tiistai 10. tammikuuta 2023 klo 14.13.12 UTC+2 slavo...@gmail.com kirjoitti:       > The click you heard might have been a relay. Did the PSU make a similar       > sound when you powered it on?       > This may be the same problem you were having before when the machine       > shut down randomly. Disconnect the PSU, give it a minute and try       > restarting it using the same method as before. If it powers on, just       > leave it running, not touching anything and see if it shuts down on its       > own again.       > Even a dead short on one of the voltage rails (touching DMM probes or       > whatever) should not cause the the internal fuse to blow. An       > over-current protection (OCP) should kick in and shut down the unit.        Thomas was right, it´s a relay that turned PSU off, not a fuse. I put power       cord on, closed pins 1-2 and PSU cooler starts. I measured       pins 5-3, was +5 V, pins 5-7 was -12 V, pins 5-16 was +5 V and when I measured       pins 5-4 I got +12 V but power went off. Like Thomas I guess that at the first       time after 10 years when I booted my 8595 it starts displaying few checkpoints       and went power        off. Any guesses what caused a relay to go off?              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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