Vizio E500I-AB No Backlight has sound

[bobbyskillz]

Re: Vizio E500I-AB No Backlight has sound

Thanks for the tips, MisterD.

[MisterD]

Re: Vizio E500I-AB No Backlight has sound

I need to see how the strips are connected together inside the panel to form 2 LED strings.
If the bad string has open circuit then you will not have Voltage on the D- which is the Cathode return for each LED string.

This is a different Model but it looks just like this..move play time to 6:16

https://www.youtube.com/watch?v=qGk6Nx82SCA&t=901s

[budm]

Re: Vizio E500I-AB No Backlight has sound

I cannot tell by looking at the video to able to tell how the LED strips are terminated at the green PCB junction, there are traces on the that PCB to rout how each LED strips are connected.

[MisterD]

Re: Vizio E500I-AB No Backlight has sound

budm I connected 27 vdc to each row, one at a time of 2 leds strips connected together, there are a total of 6 rows...in four of the rows all of the LED's lit up..the other two rows none of the LED's lit up. so there must be something wrong with those two that didn't light up. am I correct on this? if so doesn't that prove there is a problem and replacing all of the LED strips should correct it. Thanks.

[MisterD]

Re: Vizio E500I-AB No Backlight has sound

We replaced all the LED Strips and reassembled the TV. we have backlight again..tested all the old LED Strips by plugging known good into one section that did not light up with 27 volts applied..determined that starting from the bottom of TV the first and third rows had bad L2 strips. must be open because with voltage applied there was no voltage drop on the volt meter..glad to get it working again.

[MisterD]

Re: Vizio E500I-AB No Backlight has sound

I cannot tell by looking at the video to able to tell how the LED strips are terminated at the green PCB junction, there are traces on the that PCB to rout how each LED strips are connected.

We replaced all the LED Strips and reassembled the TV. we have backlight again..tested all the old LED Strips by plugging known good into one section that did not light up with 27 volts applied..determined that starting from the bottom of TV the first and third rows had bad L2 strips. must be open because with voltage applied there was no voltage drop on the volt meter..glad to get it working again.

[MisterD]

Re: Vizio E500I-AB No Backlight has sound

Still showing Model as E500I-AB should be E500I-A0 I can't edit it.