Re: HP67 problem Message #3 Posted by Tony Duell (UK) on 5 Jan 2003, 1:59 p.m., in response to message #1 by Chris Migdal
Alas it's more likely to be a dead ACT (CPU) or ROM0 (which includes the display driver) chip on the logic board. Both chips are custom and unavailable other than from old HP calculators.
The ACT can come from an HP21, 22, 25, 29, 67 or 97 (and possibly a 91 or 92 as well), the ROM0 has to come from a 67.
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