HP 110 "garbage" on screen

[Jim Horn]

The HP-110 Portable's 9 pin D connector is a serial port, not a video one. If you wish to have a video display with it, you will need an HP-IL video interface along with two HP-IL cables to connect it, all of which are not very common.

Fortunately, the '110 Service Manual is available with schematics and such. Disassembly for access to the main processor circuit board is very simple once you access the Torx screws on the bottom. I opened mine many times and modified it a lot before giving it away to another Forum member here.

Let me know if you need help - I hate to see these machines not working!