HP-32E missing segments

[Dave Britten]

(01-23-2020 09:33 PM)Moggul Wrote:  

(01-21-2020 09:01 PM)Dave Britten Wrote:  If it's like my 38E, then it's probably the crummy solderless display board connection not making good contact. To fix it, I just soldered all the pins to the pads. You could also try cleaning the connections.

Thank you Dave. I opened the calculator (easier than I thought, just a matter of some wriggling), cleaned the contacts with IPA and pressed the pinns more firmly into the pads. Now all segments light up as expected. Let's see how long it lasts...

Great, with a little luck, that'll do it. If not, just apply a small amount of solder to the pads on the display PCB where the ends of the pins come through the board. There's no real reason to ever separate the pins from the display PCB, since the other end of the pins slides out from under the black spine, which creates a pressure connection.