I push the power button and the TV starts to come on for about 4 seconds then it goes back off. It will not stay on. You hear a snap sound when it cuts off.
I have unplugged it and waited 8 to 24 hours and retried. It will come on and operate normally for a few days, then repeats the same problem.
It did this for about 3 weeks and now it will just start for 4 seconds and shut off. Have not been able to get it to play since.
Can anyone help diagnose this problem???
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Re: Power will not stay on
Sounds like its shutting down because of the b+ regulation circuit isent working and going into HI Voltage shutdown or theres a fault in the horizontal drive circuit. If your not a tech and now about serviceing the HI VOLTAGE in a tv set then PLEASE seek a service tech to assist you with this repair. Sorry i couldnt assist you more with this. Good Luck
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Unfortunately it could be any of them, start by testing the PSON voltage, it should change when you push the power on button and stay at that level, if it either drops or raises for a few seconds then goes back to the voltage it was at before you pushed the on button I would look at a bad main, if it stays at the same voltage then power supply...chances of it being a timing board are really slim if you don't have sound. Hope this helps, good luck
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Will not power, led blinking
check R640 (1K 1/4w) if open replace ic600 (8-759-670-30)
Standby led blinks slowly, a few times, chassis won't start up
I changed the vertical deflection ic type TDA8170 and I measured two
leaky capacitors in the power supply. Better to change all 4 capacitors
in the power unit, everything was then ok !