I went to an estate sale recently and found an Apple IIGS. I was very intrigued since I had never before gotten a chance to get my hands on an older piece of computer history.
Unfortunately I have not been able to get it to boot up. The computer turns on, floppy drives flash a light once, the keyboard flashes all three lights once, but I never get a sound from the speaker and the monitor only displays a green screen with four black squares.
Here's a link to what the monitor shows
I've done some basic troubleshooting including testing the power supply for the correct voltages.
The only thing I found that seems strange are 2 cuts on the motherboard traces.
The first cut is on the top of the GLU Here.
The second cut is on the back, as well as a wire jumper and a capacitor and resistor jumper. Here
Does anyone have any experience with this kind of thing? I would really love to get this thing working again!