You will need to go into the 'wimpy' service menu and choose input type as 1024 I think. It's been a while since I did this, but ifyou use a search engine for mitsu hd service mode you should come up with the right numbers. There are two modes, one is MENU 2 3 5 7 the other is the one you want. Sorry, that's the menu I don't regularly use.

One more thing, DO NOT MESS WITH THE MENU 2 3 5 7 settingsunless you know what you're doing.