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Re: Blue Screen and then shuts off.
Is the LED blinking a 2 digit code? Let me know mitsubishi will blink a repeating diagnostic code when theset goes into shutdown. Which is what your set is doing. let me know if you can distinquish a blink code from the LED.
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This is simple--this model is prone to bad picture tubes--blue is most common--screen goes bright blue and set shuts off--set is detecting too much current being drawn--forget replacing the tube--very expensive as only available on rebuild basis.
Here is what to try: 1) you need to remove entire plastic grill under screen--held in one of two ways--either several screws on back on either side or two screws at bottom front under caps.
2) With it free, pull up from bottom and tilt entire grill to the left--the front controls are mounted in it and you will need to undo some ties that hold it to get it out of the way.
3.) Grill has tabs at top that tuck in and you lift it from bottom.
4.) Remove small inspection plate behind grill--a few screws.
5.) Directly behind grill you will find a square black plastic block with 6 shafts (they are controls) One row left to right will be marked Focus--do not touch those. The other row will be marked screens. Look closely (green is the middle one) as each will have r,g,b in small black letters.
6.) In your case LOCATE THE BLUE SCREEN CONTROL. Best way to do this is take set to unused video input and turn blue SCREEN down (usually to the left and less than 1/4 turn) until the blue just goes away---on blank input you should only see VIDEO 1 etc in green.
Do not turn down too much--just enough so blue is not there--no blue background or curved lines.
THIS MAY ONLY BUY SO EXTRA LIFE OUT THE SET AS ALL THESE HAD ALL THREE TUBES HAVE THIS PROBLEM.
You only have seconds if the set is shutting down, Once you get the blue down enough set will stay on.
Take to regular channel and with color all the way off--you should have a black and white screen, adjust just a little if needed.
I have done this many times and most get another year or more out of the set--if one of the tubes is causing this (very likely) sooner or later it may get worse and return to the point where adjusting does not help--when this happens replace the set.
If this has told you something that helps you or you did not know rate this solution as very helpful as I do this here for free.
If you have questions let me know BEFORE you attempt it.
It sounds like you have a lack of signal; 1. reset TV by unplugging TV & signal sources from wall for at least 5 minutes then plug back in, 2. Turn all eguipment on such as cable box, dvd & etc, then change the inputs from your TV's remote, if still no pix,only blue.
Were the pale blue lines real thin in a slight diagonal from bottom to top of your screen? If so you either have a bad component in the blue drive, Blue CRT socket or your Blue CRT is shorted.Try removing the blue CRT socket and trying to power up your set for a moment without the blue socket attached to the tube. Be sure the CRT socket doesn't touch any components when you try this. Let me know if the set starts up without the blue.
First reduse the G2 voltage for the blue c.r.t,and watch if the unit works for longer period (offcource blue colour will be not present).After reducing G2 voltage to blue c.r.t still behaves the same than c.r.t is faulty and you have to replace.
Pls count the red led blinking when it goes off,incase it goes to std by mode.
Mine just did the same thing. Except for it was green instead of blue. The service manual states 8 flashes from the light stands for an overvoltage. After reading the manual for a bit I realized the bottom row of 3 adjuster screws from behind the speaker grill adjust the output for the red, green, and blue colors. BEFORE OPENING ANY TV OR MONITOR PLEASE KNOW THAT THE VOLTAGE INSIDE CAN KILL YOU EVEN IF UN-PLUGGED so please be careful and only adjust what is mentioned here. I un-plugged the tv, removed the grill and the board covering the internals, and carefully turned the 3 adjustment screws all the way down. I then waited about 10 minutes (don't know if this made a difference). I turned on the tv, turned the channel to an auxilary input (for a black screen), and slowly raised each of the 3 bottom screws one by one up clockwise until i could see a faint green, blue, or red line (depending on the screw), and then turned each one back a hair until the screen was black again. Only adjust one at a time, the order for colors are blue, green, then red from the left. I hope this fixes your problems. Be careful when working inside a tv, I suggest not using a screw driver to adjust the screws due to the possibility of it slipping and someone getting hurt.
Repair Kit for Hitachi convergence Chassis DP-14G KIT10 Includes 2 pcs STK392-150 , 1 each of the following 1W axial lead fusible http://www.digitalhome.ca/forum/search.php http://www.digitalhome.ca/forum/showpost.php?p=564268&postcount=220 http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html