Hi Vid. I've followed most of the recommendations in this thread for my Firepower. I added a remote battery holder this afternoon. and suddenly my score displays don't work at all. I re-seated the connectors on the CPU board with no change. They are original displays and prior to not working they looked flawless.

Do you have any hints as to where to start the debug on this? Any help will be appreciated.

Thanks!

Scratch that. its a CPU problem. Both LED 1 and LED 2 are solid. I'm going to re-seat the new 40 pin and see if that fixes it.

Thanks

argh nothing...what have I done?? Broke one of my cardinal rules "if it ain't broke...don't fix it"...stupid stupid stupid...

guess I can turn this into an excuse to buy a scope .

So I sat down with the board and realized I missed changing one of the IC sockets. pulled it out put in a couple of SIPs. Chip back in and voila...working firepower. I really thought I'd screwed the pooch on that one.

Da-Shaker I haven't gone back to read all of your posts so if you already done this please ignore my advice . My Firepower did goofy stuff like you describe until I changed the 40pin inter-board connector (between the MPU and the Driver Board) and the chip sockets. My experience was that, after I replaced the 40pin connector, flexing the board a bit caused old solder joints on the sockets to open. Replacing these fixed my issues. What to replace and how to replace is covered at the beginning of this thread.

I'm sure you can get it working right. It just takes time and patience (and solder).