Just wondering if anyone here can help with my latest problem.

Earlier today, I was quite lucky and found a PC Engine, Sega SG-1000 and a Sega Mark III for very good prices (about $13 for the PCE, and $5 each for the SG-1000 and Mark III). They're all kind of dirty and yellowed, but it's nothing that can't be corrected with some work.

I'm using an AC adapter from a model 1 Mega Drive (Japanese) to power them all. Powers them all fine. For the RF switch, I'm using a newer model one for the Famicom/Super Famicom. The PC Engine works perfectly, so no issues there. The Mark III works fine through its AV connection, but nothing at all happens when I try to plug in the RF switch. Same with the SG-1000. They both power on, but don't display anything through RF. When I say nothing happens, I mean NOTHING. The RF is fine with the PCE, but when used with the Mark III or SG-1000 the TV doesn't even flicker. I opened up the SG-1000 and it looks fine inside.

Does anyone have any ideas what the problem is with the RF connection on both systems?


Also, one more problem: the left and right functions on the d-pad don't work. I'm using a Mega Drive controller with it, since I don't have any Mark III or Master System controllers. I've got After Burner and Space Harrier. I can shoot and move up and down, but left and right just don't work. In After Burner, the jet is always turning left. Again, up and down work fine. The controller is fine, as I've used it with the Mega Drive with no issues (along with a second controller).

I realize that these are both fairly obscure systems... but I'm hoping someone here knows something. Thanks for any help!