think my unit is defective.. from the (very poor) diagrams of the AVM on the web i can see the CPU has alot of inputs, from controls etc., and some clear outputs to the modulator. I'm not seeing anything like what i should see on those outputs in any sort of repeatable or predictable fashion. Sometimes i can get something that makes sense, but the lack of consistency is making it hard to make a call on what's the right or wrong thing to do. i think tying all the lines to the modulator together via pots to make composite would be the way to go for a quick test, only as i said, i think my unit is flaky at best. I'll try this next time i have free, then if i still get nothing, it's mothballs for the unit which is in suspiciously perfect cosmetic condition.. (You all know what that means!!)
i did build another longhorn engineer modboard, the newer design, but it's not alot of use in this case - going to put that in my light sixer to replace the ugly old one i did years back..
Oh, i do see residue on the web of a circuit-bent AVM with composite out that went for sale a while back - it looks lovely in fairness, and after being inside this thing, it's VERY easy to bend, and quite safe too. if i ever get this displaying, it will be modded for sure.