Took pity on an Odyssey2 with a bad RF cord and some games at the flea market today. Replaced the RF cord and it seems to work well now. Even with the sort of crunchy looking circuit board.
If I had been a bit quicker, I would have gotten a complete Odyssey2 display kiosk for free. Sadly, the shop tossed it out about a month before I got to know them.