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Backlight Out but can see picture with flashlight Vizio E320-B2
When turned on the Vizio logo comes up dim and flickering and then appears to turn off. The picture can still be seen with a flashlight on the screen. Sound is fine. Based on what I’ve read it is most likely the power supply or the backlight but I’m not sure how to test or what parts to order. Included below are pictures of the boards.
ANSWERS:
"hi,
I don’t know the TV but if you only have a multimeter, locate the LED power connector on the power board and test the voltage there.
If it is >220 VDC then I suspect that the problem is in the backlight strips as there is no current flowing through the LEDs and you are measuring the open circuit LED voltage supply from the power board.
If it is <50 VDC then most probably it is in the power board.
Be safety aware when testing as there is exposed lethal voltage on the power board. Also ensure that the meter’s test probes do not accidentally bridge across any connections shorting them out and causing more problems
Alternatively, if you’re not comfortable working near lethal AC voltage, it may be safer to get a TV backlight tester - example only and use that to test the backlights"
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