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My Vizio D65u-D2 LED TV screen is black and there is audio. I replaced the power board and the LED driver board and the problem is notsolved. What else should I check?
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I would have attempted a system software update first once the screen went black. I would also disconnect all accessories. Then, if still failing, I would schedule a repair with a tv repair shop because it's dangerous to deal with internal portions of the tv as a consumer.
You should be able to replace just the bad LED strips however with as much work as it is to get the set apart and back together I always replace all them as other strips generally fail in time. Did they all light up after you replaced the bad ones before you put it back together? This model set has local dimming so servicing it is a bit more complex, you could have a bad backlight driver but that board seldom gives issues, also you could have main or power board issues as power for the backlight driver comes from the power board or you could have main issues as it's the signal from there that turns on each strip.
Make sure the connectors are snugly in place and that the set in not i a position that stress the boards, reset all settings then
change the picture mode to standard and auto brightness to medium
Good Luck
Mr.Mike
Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main digital board./
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