Mine is doing the same thing. I just talked to the repair guy. It is a power supply problem. Try unplugging it for 5 minutes and turning it back on. Also if you were having problem with any picture issues it is the convergance, and that requires chip replacement. They are estimating $350.00 to replace the power supply.
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Do the self check this set has, when green light comes on and goes off, on front of set press and hold both the Menu and Input (device) buttons at the same time for at least five seconds and release both buttons.
The power light will blink a two digit error code like, two blinks, two blinks, a pause and repeat it several times.
Let me know what error code you get and I will tell you what it means.
U know how to solders?Replaced the convergence ICS and all it resistors,should get ur power back.Tries Websites Tv repair World.com,Tvrepairkits.com.First check ur DM power board see not any burn parts first.
The DM is fine if the led isnt blinking. Your set is going into protective shutdown. Try pressing the menu and the device/input buttons on the set both in together for 5 seconds to see if the set will blink a series of blinks pause then blink another series of blinks. Such as 2 blinks pause then 2 blinks, Then let me know what the blinks were and I will assist you with whats wrong
you need to get the stk chips replaced. i had it done with mine, it cost me 411 dollars for a tech to come do it. it worked fine for about 4 months now, and my red color is gone. mitsubishi sucks, sorry : (