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My tv model e470-a0 vizio turns off and on with the backlight and the vizio on screen logo is crystal clear on startup. No picture and sound other than some very very faint scrambled lines towards the upper screen. No dust very clean. No bulged capacitors. Wiggled most components. Unplugged rc connector with no change.
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It uses a LG display panel & it has a common problem that burn out LED diodes.
To fix:
1. Change all of the strip at once & use new one.
2. Replace the power supply.
Does your 12 volt remain at 12 after it shuts off or does it drop to 0?..This model was known for issues with the LED lamps themselves but Ive seen a number of sets where the LED's were fine and it was the power supply or main boards bad
Check the attached links,
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The front LED light that shows whether the TV is on or off will flash so many ... press and hold the power button for 5 seconds upon plugging the TV in. ... The flashing code I got meant the power supply was bad.
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