I just bought a Datel Universal Adapter for my Mega Drive.

And I can't seem to get it to work in either my Mega Drive, or Mega Drive II.

When I first put it in, it came up with a yellow screen. Now, it's nothing more than a black display. Connectors have been cleaned, and still no result.

It also has a two-setting switch on the side.

I don't want to assume it's broken, because my Datel Pro CDX cartridge did the same thing when I first bought it. Now it works perfectly.

I'd appreciate any help anyone can provide on getting this thing to work!