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[41] Odd display problem
04-22-2015, 05:32 PM (This post was last modified: 04-22-2015 05:33 PM by Geoff Quickfall.)
Post: #5
RE: [hp41] Odd display problem
If, IF: no other issues such as memory lost or freezing ocur, then probably not the posts. Inspect them anyway.

Now to the display drivers; have you swapped the LCD with a known working board. What happens, if not, you can trouble shoot the board but the LCD panel contains the display drivers. They are found under the epoxy blobs and are inaccessible.

A spare working panel from an elswise dead machine is your best bet.

I have repaired four weird and wacky displays after checking all other connections and solder joints on the LCD panel; with spare panels from donors.

The latest being a 1979 tall keys needing a new LCD panel with working drivers for a CL conversion.

Cheers, Geoff
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Messages In This Thread
[41] Odd display problem - emece67 - 04-19-2015, 07:45 PM
RE: [hp41] Odd display problem - emece67 - 04-21-2015, 01:45 PM
RE: [hp41] Odd display problem - jebem - 04-22-2015, 04:57 PM
RE: [hp41] Odd display problem - Geoff Quickfall - 04-22-2015 05:32 PM
RE: [hp41] Odd display problem - emece67 - 04-22-2015, 08:57 PM
RE: [hp41] Odd display problem - emece67 - 04-26-2015, 07:29 PM
RE: [hp41] Odd display problem - emece67 - 04-27-2015, 06:40 PM
RE: [hp41] Odd display problem - emece67 - 04-28-2015, 07:55 PM
RE: [hp41] Odd display problem - jebem - 04-28-2015, 10:16 PM
RE: [hp41] Odd display problem - emece67 - 04-29-2015, 04:46 PM
RE: [hp41] Odd display problem - TASP - 04-29-2015, 05:01 PM
RE: [hp41] Odd display problem - emece67 - 04-30-2015, 10:29 PM
RE: [hp41] Odd display problem - emece67 - 04-30-2015, 11:22 PM
RE: [hp41] Odd display problem - emece67 - 05-01-2015, 07:25 PM
RE: [hp41] Odd display problem - emece67 - 05-01-2015, 07:30 PM
RE: [hp41] Odd display problem - emece67 - 05-01-2015, 11:22 PM
RE: [hp41] Odd display problem - emece67 - 05-03-2015, 12:02 AM



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