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If you press the TV's MENU button (not a cable or satellite box menu), can you get the Mitsubishi menu to come on screen?
Do you have any HD sources connected to the DTV input, and if so, is it also not working? Specifically, is a 1080i HD source in the DTV input also having this problem?
And specifically on an HD channel, correct? The reason I ask is because any signal that is not 1080i is processed by the TV's line doubler, which has been know to cause similar issues. 1080i also goes through the doubler, but is not processed by it, and is usually unaffected.
Also, do you have any electronics experience and would be comfortable opening up the set?
OK, when you get your power back, specifically try tuning in an HD station that you know worked before and see if there is any difference.
power is back on and still have blue screen
on high def channel that is
OK, so no video, including HD, on all inputs, but Mits menu will come on screen. Let me work on this for a bit and get back to you, but do you have any electronics experience and would be comfortable opening up the set?
I can open the set
OK, after looking over the technical info I'm guessing that the line doubler on this model most likely is not the cause of the problem, and the problem has to be either the Signal Board or the Input Terminal board (where the input jacks are). The Terminal board actually has lots of electronics on it, it's not just input jacks.
The problem is there really is no way for you to determine which board is causing the problem, and the only thing you can do is try a new Terminal board and see if that fixes it. If it doesn't, you have big problems because the Signal board is not available, and even if it were, you can't just drop a new one in and expect it to work. The Signal Board has a memory chip on it that has service settings that are unique to your TV, and a new board would have to be aligned with test equipment to get a correct picture on the set.
But at least the Terminal board is fairly simple to replace, would you like to try that? I'll be offline for a few hours, but I'll be back later.
does the new terminal board just slide in and the old one pulls out
Pretty much. What you do is take the back off of the set, then remove the plastic panel that labels the input (and output) jacks, then that board just unplugs, so it's pretty easy.
The part number is XXXXX and if you click on Encompass and log in as a guest, you can put that number in the part number box and order it.
Let me know if you have any other questions, and thanks for using JustAnswer!