RFU switch is glitchy, can it be fixed

[Shitface]

My RFU switch on my Genny has a problem. It shows the picture and the sound but the picuter goes up and down like it has a tracking problem. Can that be fixed or do i just need to buy a new one?

 

[it290]

Just get AV cables, you won't regret it.

 

[Shitface]

i have some av cables but they are also hard to get working. I guess i will buy one off ebay.