HP Forum Archive 14

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41CV keyboard cleaning Message #1 Posted by andy on 6 Nov 2004, 5:31 p.m. Hi, I have an older model 41cv (square corners on the display) which is having trouble registering the "2" key. Is it the elastomer interconnect failing or is it just dirt? I have taken the calculator apart and it looks good internally (no battery corrosion or visible dirt inside). The keyboard/display are fairly dirty though. Now that I have it apart, is it safe to clean the keyboard/display half of the 41cv in distilled water? Thanks, Andy

Re: 41CV keyboard cleaning Message #2 Posted by Randy on 6 Nov 2004, 8:06 p.m., in response to message #1 by andy If it's a single key, it's dirt since the keyboard is row/column multiplexed. Don't immerse the display, it's just not a good idea. Unsolder first and set aside. Ultrasonically clean the keyboard in distilled water if possible, that should solve the problem. If that's not an option, try a few drops of Caig DeoxIT D5 in the hole of the pcb for the key in question.

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