What exactly is that and how would I fix it?
Thanks,
Roger
U19 and U23 are 2 74LS244 chips on the main-board, they might be soldered in. a 74LS244 is an octal buffer/line driver, it is for buffering signals usually. the 2 that Trub mention are for: (U19) buffering the Atari port signals and IRQ/DRQ signals internally (to the data bus). if that chip has failed you can get the H3 (Halt in test 3) error code
(U23) sits between the 4 config switches on the back and the data-bus and the front panel switches and the data bus.
by sits between I mean electrically.
have you taken a meter and checked the voltages at the powersupply conection? if it is too far out of spec it can cause odd behavior.
if it is the disk controller, I forget exactly which one the indus uses, but if that is bad, it's a chip swap to repair the problem. I've fixed several 1050's that way, swapping the FDC chip and RIOT.
also, what part of the country or world are you located in, there may be someone near by that can swap parts / fix it for you.
I'm near Dallas, TX.
Thanks