Re: HP-41C LCD Message #6 Posted by Joe on 17 Feb 2000, 4:40 p.m., in response to message #5 by Kevin
It's not difficult to get the keyboards apart and to clean them. I've done hundreds of them. But (1) NEVER try to clean the whole thing! It's covered with a sticky glue and you'll only spread it around. Only clean the clicker disks and the contacts on the circuit board. (2) the real trick is getting them back together. First you have to make ABSOLUTELY certain that all the keys are working cause once you put it back together, it's next to impossible to get it apart again. Second, you have to PRESS the circuit board back into the case TIGHTLY or the keys will be lose and rattle. Finally you glue the circuit board back n with superglue. You have to be carefully not to use too much or it will flow into the keys and prevent them from working.
If you don't want to tackle it yourself, I charge $40 to repair them.
Sorry, I'm not NASA qualified. I know the difference between meters/second and feet/second.
Joe
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