I have a Mitsubishi LT-46244 LCD flat screen. It's not successfully booting when I try to turn it on (blue power light flashes but tv never turns on). From the research I've done, the problem is in the DM Board. More specifically, the problem seems to, typically, be with a capacitor on the DM Board. I haven't seen any physical signs of a bad capacitor.
I would really like to look at a schematic of the boards in this device, but I have had no luck finding one. If anyone can give me a link to a detailed diagram of the boards (especially the DM Board) I would really appreciate it. Thanks.

 

Google Mitsubishi LT-26244 service manual and you should have no problem finding it. If not, click on images and some more sites will pop up for you. Also try Youtube videos for repairs. There are a lot of them done on Youtube already.
ShopJimmy.com has lots on his site as well.