Do you have access to HDNet channel programming? They have a 3 pattern calibration screen that they broadcast every other Saturday. I recorded it about 3 weeks ago and used it to adjust our HD TV in the den. It's not very elaborate, but I was able to use it to improve the picture quality a little. And it's free
The below is off the AT&T Uverse U-Talk forum.
Record the HDNet Test Pattern
The first thing you need to do is record the HDNet test pattern if you haven't done so already. The test pattern airs once a week on HDNet (channel 1105), at 7:30AM ET/4:30 AM PT Saturday mornings. It is 10 minutes long, and is labeled "Off Air" in the program guide.
The HDNet test pattern runs 10 minutes, and actually consists of 3 different patterns. The first includes color bars and a brightness scale at the bottom, this is the most important pattern. The second is a convergence pattern, which is pretty useless for most of us, as it only applies to rear-projection CRT TVs. The last one is a sharpness pattern, which we'll use briefly to adjust the sharpness.
On that same thread, one of the products recommended for more detailed adjustment is
Amazon.com: Digital Video Essentials: Optimize Your Home Entertainment System (NTSC Component): Digital Video…