18 Dec
2004
18 Dec
'04
4:19 p.m.
This calculator definitely uses Vacuum Fluorescent
(VF) display tubes.
I agree it's likely electronics, but if you can get it apart
(I have no idea if we're talking about a cheap glued-together
plastic job or a big expensive desktop) I'd give the HV section
a good cleaning with alcohol (no! not that subject again!) and
a clean rag. Harmless (no! not that subject again!) to the PC
board and all. If it's operated by a cigarette smoker it could
be the problem.