|Showing the issue
|80 column RCA cable not fully inserted i.e. no ground
I have recently acquired an Apple IIe and I'm hoping someone here can help me with an issue I'm having. When I turn on the computer I see color ghosting/banding around the characters. Apart from this issue the computer runs flawlessly. I compleley cleaned the machine and have inspected the area around the video circuitry and don't see anything of concern. I did take out the 10uF electrolytic cap in that area of the motherboard , tested it (with a multuimeter with capacitance measurement), and it appears to be fine. So I put it back in. It does appear to be some sort of rining or perhaps a ground loop. The monitor is a Samsung TV/LCD Monitor combination. I'm pretty sure it's fine.
I have only replaced the RIFA cap in the power supply but can replace the others if that may be the cause. The caps in the power supply look fine as well but could still have issues.
One other item of note. If I only plug the RCA cable part of the way in, without the ground making contact, it seems to be much better. I also don't see much problem in graphics mode.
I have attached some images to show what I am seeing.
Thanks in advance for any help/insights that can be provided.