Hello all, I have an Apple ][+ computer here that I'd like to repair, yet I have no idea what's going on with it. when I first got it, I tried the DOS disk but quickly found out that either the controller or the drive itself wasn't working properly. I removed the components and tried again. This time, monitor came up and everything was all good and I had my fun tinkering with the basic language.
The next day, I went back and turned it on, but i was no longer greeted with "APPLE ][", but with this;
I tried all sorts of things to get it to work, removed and cleaned all the pins on the chips, running with no perhipherals, but nothing worked.
As far as I can tell, it must be a ROM error, but I don't know for sure.
Could also have been temperature fluctuations damaging a chip, thing probably hasn't been kept in a climate controlled environment or even seen power for many years.
I don't know, but really would like to repair it.
What do you guys think is broken and what should be my next course of action?