On Sun, Mar 09, 2008 at 01:44:33PM -0400, Douglas A. Tutty wrote: > On Sat, Mar 08, 2008 at 11:05:34PM -0600, Russell L. Harris wrote: > > >> I have a couple of new-to-me old computers. They've been well used > > >> in what looks like a normal office environment and they're a bit > > >> grimey inside; not just dust that blows away. I figure that I > > >> should clean that off so the dust doesn't act like a thermal > > >> insulator but I'm unsure what to use, since air alone isn't doing > > >> it. I don't want to remove e.g. the CPU from its socket. (P-133, > > >> socket 7). > > > > You need to remove all socketed devices, and especially the CPU. > > > > Cleaning presents a danger to the aluminum electrolytic capacitors. > > Some chemicals quickly penetrate the seals and ruin the capacitors. > > Yeah, that's my concern. Boards are usually cleaned of flux after the > soldering with circuit-board cleaner, which presumably is safe for the > newly-soldered caps. Newly manufactured boards are cleaned with Hydrogen Hydroxide. This has been the standard board cleaning agent for quite a while. As it isn't very effective on grease, it doesn't help you much, though it wouldn't hurt to try. -- Rob
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