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The thing to be careful about is static charges which can break chips. So: Disconnect the unit from power. (Unplug it: important!) Open it. Connect yourself to the metal casing using a grounding strap (http:// en.wikipedia.org/wiki/Ground_bracelet or http://www.geeks.com/ imageshare/W/300x300/WRISTSTRAP-unit.jpg). You'll easily spot the chips that are in a socket: those are the potential victims (or culprits). Gently press them down into the socket. Careful with the circuit board! Maybe others who've done it could chime in? Bernhard