Mitsubishi vs50705 turn power on green button comes on then it shuts off quickly

I have a Mitsubishi WD73642 model which I'm having a problem with it turning off. When power is turned on the status light flashes green and appears to be powering up. Then u hear sound. Picture comes on light turns sold green then within a minute the El TV will just turn off no other dianososis lights. TV is not located too close to the Wall. Any ideas why?

you have a short circuit in the power supply.
1) test the power cord very well
2) test the main swithc for short or open
3)test the power supply, look for a short in transformer+coil+filter+diode+rectifier. and replace
4)test the HVRECT+fLYBACK+ horizontal output for +125Vdc +vertical output for +80Vdc ALL this go to the CRT
color +12vdc+other circuit +12vdc. The first thing do you will have is RASTER, see the block. d
God bless you

If you are getting at turn on source and back ground is all blue the set will shut down rather quickly;

I have a suggestion, if it works fine, and if not it will not hurt anything.

with original Mitsubishi remote turn set on and then Menu, 1,2,3, enter.

This is the soft reset that most of these sets have (cannot be sure since Model number above is correct?)

The reset button on the front (if it has it) just shuts the set down and reboots the DM unit inside.

Most of these sets when it is pressed the green light will blink for about 70 seconds and go out; that is the DM unit rebooting and the soft restart is something else.

Let me know what you find before you rate this information.

SD TECH

When you turn it on and it shuts off---ON THE FRONT OF THE SET PRESS AND HOLD BOTH THE MENU AND INPUT(DEVICE) BUTTONS TOGETHER FOR AT LEAST 5 SECONDS AND RELEASE BOTH BUTTONS.

Power light should blink a two digit error code---for example: 2 blinks, a pause and 2 blinks--This is the most common error code.


Let me know what error code you get and I will tell you what it means and if 2-2 what the problem is.

If this information helped you, rate this solution as I do this here for FREE.

SD TECH

set has a self diagnostic---after set does shut down press and hold MENU AND DEVICE(INPUT) buttons on front of set for 5 seconds----if 2 blinks, a pause and 2 more blinks: this is short protection error code---The set does use 2 Stk394-250 and each is protected by a pico fuse in the power supply---if either fuse is blown the set will shut down(it detects no voltage or missing voltage;) It is not uncommon for a shorted IC to cause this problem; if you locate the STK's look carefully at the resistors around them---if any are discolored or burnt---you have found your problem.

YOU GOTTA REPLCE THE STK ICS OR THE CAPS ON THE DM BOARD

continue to push power button until light turns green. verie rate of push and hold

try holding in the menu and input buttons together on the front panel for about 8 seconds to see if the self diagnosis feature will blink a two digt code then let me know what happens

Please verify Model # and mo / yr built off back of set...
critical for correct solution........T.

You could have a problem in the sweep or main power supply, Bad capacitors on the DM module, they will be all grouped together and have swollen tops, Coolent fluid leaking out of one of the CRT's. If you have no electronic or solid state repair experience, please get a pro to assist you in this repair. Good Luck