Re: HP-41C/LCD Display Problems Message #7 Posted by Randy on 19 Nov 2010, 4:44 p.m., in response to message #1 by Kevin Kitts
Quote: Is there any way to repair the LCD? I don't want to put a lot of money into it - so it would have to be a do it yourself repair...
Missing segments in a fullnut display is caused by one or more of the following three things: - Defective LCD
- Defective Display Driver
- Bad interconnects between 1 & 2 (elastomeric zebras)
It is one of the more difficult problems in a 41 to repair and you risk LCD damage if done incorrectly. If cleaning the interconnects does not resolve the problem, you'll need another LCD and driver to troubleshoot.
If the calculator had signs of battery leakage, I would lean towards an interconnect problem on early 41's, especially if it has the round gold connectors. Those typically need to be replaced.
If the interconnects are white or pink, it is most likely a bad driver.
Edited: 19 Nov 2010, 4:50 p.m.
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