OK I am a complete N00B at this sort of thing, but I'm trying to learn and I've got a "reset" button so I don't mind messing with stuff. My tv is a Samsung RP, HCW(?)5515 or something close to that (never find a model number on these things after you buy them!). The vast majority of my viewing time is spent watching Dish Network through the Svideo input, so this was where I began my efforts to clean things up. First I pulled up the service menu and tried to reduce overscan to the minimum possible (I brought it down to probably 3-5% - it was throwing away a LOT on the edges!), and centered it as best I could. Then I got into the geometry/convergence correction, straightened out the grid on green and then converged the red and blue to match. So far so good. I then switched to the first Component input (480i / 480p capable) and used the only component source I currently have, a Playstation 2. Still so far so good in 480i. Next step, I insert a game that has the menu option of switching to 480p mode, and engage progressive mode. Picture is now nice and clear, but is underscanning about 15% on each side, and the geometry is off as well. Now this is easy to correct and everything... but once I corrected it, I went back to the Svideo input to watch satellite and the convergence is off again. So what's the deal? Do I just have to pick my favorite screen resolution and assume everything else will be all screwed up? I'm a bit confused here.