Cleaning and Restoring a Badly Corroded PSU

Actually I didn't say they have leaked, but I do say that they could only have leaked from the bottom, but you can't tell. This does appear to be what happened to some of the capacitors I had on the other PSU I repaired recently, although again I can't be sure. However there *is* something on the board to which dirt and little shards from the heat sinks appears to be sticking at least a bit, but perhaps it is just dirt that has absorbed humidity. Certainly the board has been in some kind of humid environment, the case itself is quite rusty in places. So it is probably more like someone else suggested, and not capacitor leakage but a humid/damp storage environment. Either way, does anyone know if those heatsinks are a standard part? If not I am not averse to replacing them with something else, but it would be nice to keep things as original as possible. Regards Rob From: dwight [mailto:dkelvey at hotmail.com] Sent: 23 October 2017 23:10 To: rob at jarratt.me.uk; Rob Jarratt <robert.jarratt at ntlworld.com>; General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: Cleaning and Restoring a Badly Corroded PSU I don't see why you have assumed that one of the capacitors has leaked. The corrosion could have come from water or condensation onto the board. I don't see any corrosion on the components. Dwight _____ From: cctalk <cctalk-bounces at classiccmp.org <mailto:cctalk-bounces at classiccmp.org> > on behalf of Rob Jarratt via cctalk <cctalk at classiccmp.org <mailto:cctalk at classiccmp.org> > Sent: Monday, October 23, 2017 1:45:42 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Cleaning and Restoring a Badly Corroded PSU I am now looking at the H7826 PSU that came with a TURBOchannel Extender. It looks like there may have been capacitor leakage and some heatsinks will need to be replaced. I have posted pictures here: https://robs-old-computers.com/2017/10/23/corroded-h7826-power-supply/ So two questions: 1. Any suggestion on how to clean the board? Some of the corners are a bit inaccessible to reach with just a cotton bud and isopropyl. 2. Do those heat sinks have a particular name/spec that I can search for? Thanks Rob