HP 32E - Zeros in display / blank display.

[PANAMATIK]

(03-11-2015 12:35 PM)ElectroDuende Wrote:  Regarding the contact problem... I suppose it is something one can expect; the calculator may be working properly, but once open, it is easy to touch the IC's pins or PCB pads and cause local corrosion (well, just a thin "patina") that may affect conductivity. And, as the chips are just pressed and don't slide (like HP48GX cards), the patina is not "self cleaned".

Because it was not "self cleaned" and the pads had small black patina spots, I used this brass brush "dremel" tool to remove the patina from all pads and pins. Also the display contacts had to be brushed. This was very helpful. May it last another 30 years now.

   

Bernhard