Sudden death in the family :(

On 2003.09.11 14:45 Fred N. van Kempen wrote: I had this sudden PSU death with a BA23 and a SGI Personal Iris 4D35. I heard that electrolytic capacitors can cause this but I have no detailed knowledge about this. :-( Remove everything from the machine that is not essential for basic operation. Keep only CPU, RAM, SLU. No drives etc. and retry. Try with different boards if it does not work. I had the same with my PDP-11/73 in a BA23 and it was a dead TK50 that caused a short. Have a look at the power wires / plugs at the PSU. Sometimes they get corroded. Have a look at the cards. Are there any wires from the components bent and shortened? A friend had a "dead" PDP-11/53 CPU that had some strange bus errors. (A bit was allways "1".) On carefull inspection of the PCB we found a wire from a resistor that was bent and connected to a pin -- tsch??, Jochen Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/