RML380Z and exploding sun psus [long and boring]

Well, it cetainly has been an interesting weekend. Massie and I bimbled on over to chez Honniball, and cleaned him of house and home :) The sun 3/470 and 4/370 *just* went in the car, and the boot filled with sparcs. Muchos gracious! Build up the 3/470, dropped in my spare scsi controller, and off we went. Booted sunos4.1.1.sun3x just fine, but I got bored and didn't install it. For some reason or other I put a card in the slot next to the psu, so in order to get it out again - to diagnose the vme interrupt errors - I had to pull the psu. So all cards except cpu, memory and scsi out, psu back in. All checked for seating, and screwed down. Power up. **BANG** Psu blows its guts out :( Now I've never experienced a big psu blowing, and I don't want to again - 1300W of psu makes a big mess :( It looks as if a capacitor failed, and took out some semiconductors. Much ceramic shrapnel now being distributed throughout :-/ I took the whole machine apart, and checked all electronics over with a magnifying glass. I couldn't find a burnt connector, overheated track or any visible form of damage. SO I just reassembled with the psu out of the 4/370. Works now :) Capacitors are starting to become my least favourite electronic component (what after realising i've over 7 sun slc/elcs to repair due to cap failure) Ah well. The backplane on the 3/470 is a bit wierd tho - neither scsi controller works today - which is odd. Yet both function in my 3/140, even the one John said was broken! Anybody got any docs on the 3/4xx backplane configuration? Anybody got a spare? Anybody seen one with some solder on it - with components attatched by more than a press fit into the plated-holes? I'm confused :-? OH - the RML380Z now works fine with it's replacement low-density controller :) Both drives light up, make noise and try to do things, so I'm a happy bunny :) I'd still like to get the high density controller going sometime - but a least now i'm one step closer to booting cp/m. Dave. __________________________________________________ Do You Yahoo!? Yahoo! Shopping - Thousands of Stores. Millions of Products. http://shopping.yahoo.com/