7800 RF jack - sensitive to movement

[DrVenkman]

I pulled out my 7800 today for the first time in a number of years. It powers on and plays carts just fine but the RF jack seems a little bit wonky. If the video cable is moved, the screen display becomes distorted and scrambled. Wiggling it a bit seems to make the problem go away until the cable is moved again.

So, questions: #1) Anyone have an idea if this is likely just the RF jack on the motherboard working loose and needing to be cleaned up and re-soldered? #2) Is this likely to be indicative of anything more serious?

 

I have never opened up this box and in fact, I don't even own a soldering iron these days, but I'm not afraid to re-learn old skills by doing.