TL;DR scrambled video for all dashes except Frosty's and UnleashedX via DVD.
Got a hardmodded (Xecuter2) xbox running XBMC as the default dash. It's been years running without any problems. It's been hooked up to a SD TV and I have component cables out.
Yesterday I got (finally) a new HDTV so naturally I wanted to hook up the box to see how it looks in HD. Changed the settings to 720p, effed around for awhile, then unhooked it. Plugged it back into the SDTV, scrambled picture. Must be because I'm still outputting 720p. Double thumbstick, user settings deleted, still scrambled.
FTP in (I can, so the XBMC must be loading), delete XBMC and upload a more recent build. Still scrambled. Check out guisettings.xml and try to force 480 and turn off any HD output. Still scrambled.
Here's the weird part - when I turn on the xbox I get the "xecuter2 live loading" clear as day, wait a few seconds, two screen flickers and then scrambled static, no sound. Original dash loads fine. Frosty's loads fine. Unleashx loads fine from DVD, NOT from the hard drive.
Please help. I'm bashing my head against the wall on this one.