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   comp.sys.ibm.ps2.hardware      Discussing IBM PS/2 hardware      42,985 messages   

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   Message 41,182 of 42,985   
   Louis Ohland to Pertti Helander   
   Re: My IBM PS/2 8595-AKD missing power.   
   10 Jan 23 08:41:27   
   
   From: ohland@charter.net   
      
   There is a RETAIN tip concerning AC power cords that have taken a "set"   
   at the female end. How old are these AC cables? Are they fully seated   
   into the 95 PSU? Did you try another AC power cord?   
      
   Pertti Helander wrote:   
   > 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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