Okay, thank you. The problem you are seeing is caused by a defective Main PC board in the TV. Bad Main boards in these sets have been a bit of a problem for Mitsubishi recently. In fact, Mitsubishi has had trouble maintaining a stock of replacement boards because of the numerous failures.
The Main boards do not show as being currently in stock, but they are scheduled to be available on 11/16/10. If you are still within your one year warranty, it may be a good idea to schedule a repair as soon as possible, just in case Mitsubishi (temporarily) runs out of these again.
If you're curious, the part number is XXXXX and it retails for $221.90. Usually the labor is in the $200-250 range, if
you had to pay for this out of pocket.
If needed, your nearest authorized Mitsubishi servicer can be found by entering your information on this page:http://direct.where2getit.com/cwc/apps/w2gi.php?template=search_new&client=mitsuservicer#?mid=174138
Even if you are slightly over the one year warranty, Mitsubishi will still very likely cover the repair, since these have caused such a problem. I recommend contacting Mitsubishi Consumer Relations at(NNN) NNN-NNNN to ask (emphatically insist) that they cover the cost of the repair. Please remember you paid a premium price for a premium brand TV that has lasted only a year and already needs a major repair.
Important: Usually Mitsubishi requires one of their authorized servicers to check the TV on-site first, before they will offer a concession (even though they will already know exactly
what is wrong with it by your description). It is best to have an estimate of the repair from the technician before you call Mitsubishi (if the TV is over one year old).
I know this is not good news, but it is the truth. Please let me know if you have any questions, or if I can help in any way.