Questor

The serial number is 88237. I have three games with the original boxes and manuals: Tennis/Squash, Blackjack, and Baseball.

I'm sorry if this is the wrong place to ask for help. I have an RCA Studio II system that half works. By that I mean only half the lines show up on the TV screen. I've attached a picture of the built-in Bowling game. There are evenly-spaced gaps in the solid white border as well as the bowling ball and pins. I've tried the system on several different TV sets, including one from the late 1970s. I've switched the channel from 2 to 3. I've tried both the original switch box that came with the system and a second switch box I picked up years ago. The original power adapter failed so I replaced it with a 9v 300mA AC adapter. This was also years ago. Is this the wrong power adapter? Is it possible I fried the circuit board(s)? Thanks for any help.