I had posted previously on general repair section, but thanks to helpful guidance I've narrow down the problem to the monitor.
I have a Midway Space Invaders upright, and the screen is scrolling right to left (viewed with the monitor rotated). I tested the power supply (it is all fine except for the 18V which appears to be dead). The game itself appears to work fine.
I took an old B&W TV that had a composite input, and connected it to pins 18 and 17 on the motherboard - and the image was there, rock solid. I have to believe that it's the monitor given this evidence.
I have the Motorola M5000. From the service manual I don't see any way to adjust the vertical hold. Also, the screen is overall about 1/2" too high (or too far to the left if the monitor wasn't rotated) and I'm not sure how I would go about fixing that either.
Don't know if it's relevant, but the monitor is makes a pretty good high pitch buzzing sound too...
Thanks.
I have a Midway Space Invaders upright, and the screen is scrolling right to left (viewed with the monitor rotated). I tested the power supply (it is all fine except for the 18V which appears to be dead). The game itself appears to work fine.
I took an old B&W TV that had a composite input, and connected it to pins 18 and 17 on the motherboard - and the image was there, rock solid. I have to believe that it's the monitor given this evidence.
I have the Motorola M5000. From the service manual I don't see any way to adjust the vertical hold. Also, the screen is overall about 1/2" too high (or too far to the left if the monitor wasn't rotated) and I'm not sure how I would go about fixing that either.
Don't know if it's relevant, but the monitor is makes a pretty good high pitch buzzing sound too...
Thanks.

