Atari 2600 No Video (flickering when messing with AV)

[DordTrain]

My atari used to work perfectly fine, checking on it lately it doesn't show any picture on my TV. I have tried testing the capacitors and chips with a multimeter and nothing seems out of the ordinary.

I have noticed that when I plug it in, the TV flickers. Also when I unplug the Video cable and tap only the tip to the Video plug on the Atari, it flickers continuously.

Here is a video of the flickering mentioned above. Note: the original flickering is just the 30 fps of the camera.

Any tips on how to restore the video back? Has anyone encountered something similar? A "no video" issue? Let me know.