Okay, so I just bought an Atari 2600 jr. and tried to hook it up to my old 90's television. I found a signal on channel 8 however it doesn't give me a proper picture or sound... in fact it changes between two static pictures. I have no idea why it's not working but I've tried checking my AC adapter and it seems like it's working as it's supposed to. I have also opened it up despite it still having it's warranty seal meaning it has never been touched inside and it wasn't dirty or anything since the previous owner had kept it in the box and barely even used it. So I was wondering what could cause this?

The static screens:



Also it appears pretty much mint except for the AC adapter which has been twisted a bit in the box...