Missing segments on HP-65

[teenix]

It looks like those LED segments have failed either fully or partially. I have seen segments fail like this before and it looks like the only way to fix it is to try to find replacements for the 5 digit LED modules (any classic types will do) or another key/display board.

cheers

Tony

(12-10-2019 09:29 PM)Moggul Wrote:  I just acquired an HP-65 which was advertised as non working. It came in a beautiful case with the Standard and Math 1 pacs so I thought to give it a try.

Turns out the previous owner tried to power it up directly from the charger with no suggess, but when I installed a good power pack it instantly came to life.

The problem is some of the LED segments do not light up. As you can see in the pictures digits 3, 5 and 8 do not light up properly (the display should read -8888888888.-88).

Is there a known cure for this? Should I open it up and clean the contacts? Or is it a lost cause?

Thanks!!!