AT&T 6300 PSU Question

On Apr 14, 23:22, Tony Duell wrote: There's a lot of brown/grey corrosion on the top surface near the terminals, and not a lot else visible on the PSU itself, though it looks like there's some on the base of the computer case around the PSU. I prefer WD40 to machine oil for electricial connections, but I have to agree with Tony that it's very easy to misuse. It should be supplied in micro-syringes, not spray cans, IMNSHO. Or only available on prescription, perhaps. That's why I said to be sure to wipe off the excess. And WD40 should be kept away from moving metal parts. It's sometimes useful as a plastic anti-squeak lubricant, but definitely not for metals. I use CLP-BreakFree for that :-) I've seen contact cleaner seriously misused too. Some types leave "a light film" behind -- if you use a little, once. I once had to fix a BBC Micro with faulty ROM sockets; the owner had repeatedly fed it contact cleaner until it was swimming in the stuff. ISTR cleaning most of it off with 1,1,1-TCE and then washing the board in Teepol (industrial grade/laboratory detergent) before it could be attacked with a soldering iron. -- Pete Peter Turnbull Dept. of Computer Science University of York