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tarnish on back of CPU

ppara5
Valued Contributor I
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I received some old PCs from a business. Most of the parts are old and only good for proper recycling. The CPUs are interesting, however. Most look as shiny as they would have when they were new, but a few had tarnish on the back. What I mean by this is that a few of the gold/copper pads on the rear of the CPU look like old brass when it needs some Brasso polish. Is this a bad sign or merely normal for CPUs which have been handled by oily fingers? Is there any way to clean them, for example, some solvent on a q-tip?

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Jose_H_Intel1
Employee
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Clean it with alcohol and a tissue but make sure you discharge any static charge first by touching a grounded metal or computer chassis.

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