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Sound on means audio section is ok. No picture is video board problem. Pl check input cables. Or give Hdmi cable input. Disconnect all inputs switch on u should get plain raster that is only dots on screen, or blue back screen, if nothing contact authorised dealer,
If cable/SAT box, hook-up that box video/sound output to DVD video/sound input. If no cable/SAT box, hook-up cable from wall into antenna/cable in on DVD and tune DVD to channel wished, and hook-up DVD TV antenna out to TV antenna in. If DVD has no antenna/cable in, TV must have video/sound output. Hook to DVD video/sound input.
Hope this helps.
This is normal, when you go from HDMI to DVI, the sound does not get transmitted. You need a separate cable to go from audio output on the computer to Audio input to the TV. There are speaker (headphone on laptop) jack to RCA audio cables, you could also go with digital audio or even optical out if your computer and TV both have the input and outputs.
Try another AV cable or another TV, if it doesnt work, that means that there is a problem with your AV PORT. and you need to send the console for repair, Call 1-800-4MYXBOX to check the warranty status
The power supply is not providing enough voltage to the back inverter board due to leaky or dry capacitors in the power supply.
The power supply will need to be replace or repair to restore the LCD functionality.
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