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Start simple by using different cables, whether they be HDMI, VGA or standard COAX cables. They could be losing the connection. Also, it's possible the power supply is wearing out and it gets too hot. You might want to simply try some spray air duster type thing to clear out any dust that can make it hot.
This is a simple fix and not hard to do, first you must get the speaker grill off, usaly two screws on the bottom and they might be hidden under to caps, then remove the acsess cover from the front. From there you should see a control box with six controls, three on top of three,,,,One part label "screen" the other "focus" now turn the set on and tune to a input that HAS NO SIGNAL this should give you a black pix, probley not now but it's supose to be black. Now turn the ones marked screen , one at a time counter clockwise just a little to get the pix compleatly black, now starting with one color turn the control slowly clockwise till the color just appears then turn it back down till it just disapears (Black) do this for all three colors Now the set should runn
TV has gone into "protect mode" to do just that to protect against the damaging failure that has been detected, you will need a servicer to diagnose the failure. Good luck and Merry Christmas!
you are having a heat related issue and the component or parts are failing. using a hair dryer blowing into back of set will make it black out and a portable fan should cool it enough to come back on. unless you know a good cheap tech, repairs are costly. i left the business when t.v' s became disposable.
Well let see if we can talk you thu "grayscaling " a set, first remove the speaker grill and the front cover to expose the screen/focus controls these will be six controls mounted on a plastic looking box, next turn the set on and get a good signal, Then from the custmer menu simpley go the the pix settings and turn the color all the way down, next use the screen controls to make the pix the best black and white you can. Next turn to a input that has no signal and the pix should be black, if there are small retrace lines simply turn down that color till it goes away , then back to a signal source that should still have a good black and white pix. Put everything back together and turn the color back up
when the light goes red it should be blinking a two digit code and repeat itself continuosly. slow blinks are the first digit and fast blinks are the second digit
Could be a problem in the shutdown circuit,in the HI Voltage detection circuit,or the flyback transformer. If your not a tech, you shouldnt be experimenting by adding parts as its going to knock you against the wall if it bites you. You should start out with a service manual and check the voiltages as now thinking it could be the power supply voltage regulator also. Please call a pro to assist you with this repair. Good Luck
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