bigchump, you may get additionall suggestions if you tell us the brand and model of your TV, and let us know exactly how the ComCast box and your Magnavox are connected to it.
It might be the ComCast box is defective, or it might not. Some cable boxes are designed so their HDMI connection overrides their analog composite/s-video/component connections. IOW, if you have the TV connected to ComCast via HDMI and the HDMI set to 1080, the analog outputs to your 537 could be all mangled up because the box stupidly assumes you would never use both HDMI and analog at the same time. Try disconnecting the ComCast HDMI from the TV, and see if the signal thru the 537 corrects itself. If so, ComCast is using that annoying type of box, and there's no easy way to work around the issue short of renting a second box for the 537 or putting together a complicated HDMI splitter + HDMI>s-video hookup.
DVD recorders occasionally "forget" key settings when unplugged and moved to a new location: you might want to verify your 537 tv display menu is set to 16:9.
If the 537 is connected to your TV via HDMI, try cycling the HDMI button on the Mag remote. The highest 1080 upscale setting can be problematic, creating odd framing distortions (this happens with BluRay players as well). Try using the 720 setting, or s-video output to TV, instead. Does the distortion go away?
With some TVs, each input has its own bank of settings, so you might want to dig around the TV input menus to make sure they don't have conflicting HDMI upscale or aspect ratio adjustments running counter to your 537 settings.
There's a small chance your 537 just went completely wonky during the move and needs a total reset: wajo gives instructions on how to do that here
. Its a long shot, but a hardware reset might
fix your distortion issue.
Finally, it may boil down to just a difference in the way cable and satellite work their boxes. You may have been getting a full anamorphic 16:9 signal over s-video from your DiSH box, but very VERY few cable boxes offer that feature. The overwhelming majority lock their s-video and composite outputs to 4:3 letterbox. This can result in rotten framing options on some channels, and needing to zoom the letterboxed frame to fill your screen. If this is the problem you're having, it is quite common with cable. To avoid it, you'd need to go back to DiSH or tolerate the image degradation from a component or HDMI converter.
Good luck to you!Edited by CitiBear - 8/21/13 at 11:11am