Check the previous posts in this thread. Someone gave a good list of service menu modes. The access code (assuming it's the same as the 3097 model) is: power-off, mute, 1, 8, 2, power-on. The geometry on my set was the only thing that really needed adjustment but be advised that the info here was gained only by trial & error. The H-EW adjusts the screen width/overscan, the H-shift moves the screen left or right, the bow bends the screen convex-right, H-parabola bends the middle screen portion convex-left/right, angle will shift the screen into a right/left-leaning parallelogram, Trapezium (a.k.a. keystoning) will narrow the top & widen the bottom of the screen or vice-a-versa (+/-), Upper corner & lower corner will horizontally shift the corners of the screen. There are also a couple of screen edge adjustments CXA left blk & right blk that I didn't try (but probably fine-tune the overscan edges) and V-Amp & V-Shift which control screen height & vertical position. I believe these should be the same functions on all inputs 480i, 480p, 1080i. Writing down the current settings, which was suggested in a previous post, is a good idea in case things really get messed up. Also, wait a few minutes after you restart before making any adjustments. Since there seems to be some HV blooming with these sets, working with a static screen source is advisable (ie. pause a DVD signal on an average brightness scene). If you have access to test equipment or the AVIA DVD all the better.