I purchased an Atari 130XE on Ebay back in 2001 and used it quite a bit for a couple of years until I upgraded my PC and no longer had a serial port and couldn't use APE as a file server.
It has been put up since 2002/3 and when I got it out recently to try out again, I discovered the video is trash. I didn't show the RF video but it looks like the composite photos only more blurry. Below are photos of the Pac-Man title screen and the boot screen in composite and s-video (custom cable using chroma and luma signals) and I have also included the same screens from my Sophia DVI mode for reference. Pardon the "Input out of range" box in the middle of the Sophia photos. My monitor doesn't like the signal.
Can someone give me suggestions on why my Composite and separated video look like crap? The chroma/luma (separated or S-Video) video jumps and displays wavy color distortions like RF interference but this wasn't present when I packed up the computer in the early 2000s. Prior to packing up, the composite was the video mode I used most and it looked good. Now it's vertical gray bars.
Could this all be due to the RF Modulator going south on me? I understand some signals (composite) come from the modulator but can that also inject color garbage into the CHROMA signal?
Boot screen using bad s-video (chroma/luma separated video) (custom cable)
Boot screen using bad Composite (should be blue but has gray bars)
Boot screen from Sophia DVI (monitor shows input out of range error)
Pac-man title using bad S-video/separated video
Pac-man title using bad composite video
Pac-man title using Sophia DVI (monitor doesn't like DVI signal)