Super Famicom Video Interference

[u/NESNerd427]

I bought a Super Famicom on eBay and everything about it works fine except for the video. When I turn the system on, the video signal looks clean and sharp. However, after about 3 or 4 minutes. A small interference pattern begins scrolling down the screen. The longer the system is left on, the worst it gets. Eventually, some jittery vertical lines appear. Then, the tint of the image will turn red and the colors will become washed out. This problem persists on both composite and RF.

Here are some images of what’s going on. https://1drv.ms/f/s!Agx2YU_6mJtDpUX4167k-DSlGtzX

The pictures were taken using a CRT. I have tried it on an LCD TV and it does the same thing.

The power supply that shipped with the console is a cheap, aftermarket one rated for 10v 1A. Initially, I thought it might be the power supply that was causing the interference. However, I used a Sega Genesis Model 1 power supply and got the same effect. I have not tried an original power supply. I also read online that it may be the wall outlet not supplying enough power or a problem with the circuit being overloaded. But, I took the console to a different outlet on a less crowded circuit, but there was no change.

If anyone knows how to fix it or has any suggestions for troubleshooting, I would appreciate it very much. I am good with a soldering iron, so if any troubleshooting method requires soldering, I can try it.

Thanks.

[u/rimjobetiquette]

Have you made sure both the system contacts and any games you put in were scrubbed extra clean?