Subterranea: Could not find on eBay
Montezuma's Revenge: Found 1 on eBay but without manual
Dragonstomper: Could not find on eBay
Suicide Mission: Managed to find a manual on eBay, but not the cassette in case.
Phaser Patrol: Could not find on eBay
All my 2600-related stuff works: 2 CX-40s, a set of paddles, a Vader console and a light-sixer. Considering this stuff was made at least 30 years ago, all still work. (1 of the CX-40s is malfunctioning, however. Currently looking for a replacement on eBay.)
Ah, ok... To me it looks like an external RF modulator.
Edit: Ignore what I said earlier, I have found out that it is the power cable. Jiggle it a few times to get the picture to come up.
The TLC part was actually my thoughts on this problem. I just heard that expression somewhere and instinctively used it.
Edit: Ignore what I said earlier, I have found out that it is the power cable. Jiggle it a few times to get the picture to come up.
Nope, its channels 2 and 3 only.
I myself was having the same problem. Just got a 6-switcher in the mail today with the same problem and fixed it, although it took a long time to fix. It came with the RCA to coax converter. The system itself is not dead. Edit: Ignore what I said earlier, I have found out that it is the power cable. Jiggle it a few times to get the picture to come up.
As for the black screen for cartridge absence: I got random screens when turning on my 6-switcher, but the first one was black w/ random noises.