thanks, you're probably right, but there was a possiblity of it being the jacks on the TV chassis. Either way it's fine now. The hidden service menu was responsible for at least 50% of the improvement. There are only like 4 standard user picture settings, but in the hidden menu there are like 10. One of which is an extra brightness setting. Before I adjusted it there were sections of dodonpachi that were pitch black, and afterwards you could see that there was actually backgrounds there. This menu is cryptic, but after doing it so many times I remember it by heart....
Turn volume to 0, put it on channel 124, go to menu -> timer -> sleep -> 30 minutes, exit menu, hit volume down button ON CHASSIS (not remote), and it goes into the service menu. You can also adjust verti, horiz hold...