TV turns on but has no picture or sound.

Coby tv locate blown fuse Coby DVD765 Theater System

What's the model?

Repairing Flat Screen TV - Blacked out with blinking red light

? 12:00
https://www.youtube.com/watch?v=3GmtBthpzDk
Mar 15, 2012 - Uploaded by n1bpd
Repairing Flat Screen TV - Blacked out with blinking red light ...Capacitors are little cylinders with a flat top with an X. If they have failed the X .... picture, no sound, totally black just the red power light blinking on the corner ... hello i have a dynex dx-lcd42-09 the red light blinks as soon as i plug it in i opened ...Missing: 5x

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model. serial numbers would be helpful.

Sounds like a power board failure.

If you have sound knoledge in digital electronics, download the service manual to your tV from net and try to find out.

Can be 1 of 2 things. 1st the red tube just needs the voltage to it turned down. In the front of TV (you have to remove the lower front half of TV to access it) is a plastic square with 6 knobs. The from left to right top knobs control focus for blue,green red. The bottom knobs control voltage to each tube in same order (so lower right knob for red) turn SLOWLY to left to reduce voltage until excessive red and lines go away. If you over turn left or right set will turn off. If that does not fix it or if lines reappear then option 2 is that red picture tube is failing outright and needs replacement.

How many times does the light blink red? It should blink so many times then stop then blink again. What's the sequence? This will help me determin where the problem is.

My TV did the same thing today. My red light blinks 6 times. Any help would be much appreciated!