I have an Apple II+ which broke many years ago. My father believes one of the expansion cards was not properly inserted in the slot, causing it and the computer to stop working.
I would really like to repair this computer, but I am not sure what is broken. When I power-up the screen is just full of garbage, like "??EE??EE" or something like that. There is no beep, and no activity in the disk drive. It seems like most circuits are in fact running (could only check this with a DC volt meter; not the best way...). Thus it seems like the master clock is running, and the character generator ROM and at least some of the RAM is probably OK.
Any ideas on how to fix it? Where to begin searching for the problem?
BTW I also have an Apple IIe clone from Redstone, which works like a charm. I played lots of old games today, and got really nostalgic