HP-27 Repair/ACT/Panamatik LP?

[teenix]

The keypad pcb could be tested with an ohms meter to test the continuity of the discoloured tracks. but could be repaired easy if open circuit. Probably caused by battery gunk.

The under side of the main pcb looks ok, although on the top right corner there looks like a defect between pins 1 and 2 of the 5061 0430 chip

The bottom side looks like corrosion around the 5061 0459 chip so might have more under it.

Can't help with the wire.

It looks like someone has gripped the chip ends with needle nose pliers and gouged the ceramic. For what reason, escapes me. The solder connections for these chips look normal under the board so it doesn't look like they were de-soldered first.

I'm not sure if the gold connections have been damaged and would be hard to know without knowledge of the chip.

Maybe one a Bernhards upgrade kits would save the day.

cheers

Tony