VIZIO E550i-B2 Sound - No Video Problem

[SLK001]

Re: VIZIO E550i-B2 Sound - No Video Problem

Just a me too to say thank you to the original poster for documenting this. I think every joint on one side was bad, I'm surprised that the thing worked even intermittently.

Probably the solder was originally under tension. Since solder will flow under tension, they probably fractured one-by-one until none remained connected.

[barrettn]

Re: VIZIO E550i-B2 Sound - No Video Problem

Just a me too to say thank you to the original poster for documenting this. I think every joint on one side was bad, I'm surprised that the thing worked even intermittently.

[Rkvarner43]

Re: VIZIO E550i-B2 Sound - No Video Problem

Thanks for the info. I had a E550i-B2E with the exact same symptoms. Took the power and LED boards out together and saw cracking in the connector solder joints on the power supply board. Desoldered the pins, glued the connector to the board, and reflowed the solder and it fixed my set! Now to try the same fix on my daughter's TV (same one, slightly different problem).

[Rkvarner43]

Re: VIZIO E550i-B2 Sound - No Video Problem

Thanks for the info. I had a E550i-B2E with the exact same symptoms. Took the power and LED boards out together and saw cracking in the connector solder joints on the power supply board. Desoldered the pins, glued the connector to the board, and reflowed the solder and it fixed my set! Now to try the same fix on my daughter's TV (same one, slightly different problem).

[badvizio]

Re: VIZIO E550i-B2 Sound - No Video Problem

You guys are awesome!!!! I had the same exact problem on my e550i. All solder joints were fractured on the PS side of the connector. Obviously a design flaw by Vizio. Anyway, I desoldered all of the joints and resoldered each one, reassembled everything and it works perfectly. Highly recommend that anyone that has no picture but does have audio start here. Most likely this is the issue.

[SLK001]

Re: VIZIO E550i-B2 Sound - No Video Problem

This was awesome. However, mine broke on the power board side. I removed the power board and the driver board as a pair and touched up both sides.

Once again thank you very much.

Mine also broke on the PS side. The pins on the PS are extremely sensitive to fracturing due to the PCB being only single sided.

[johns1mj]

Re: VIZIO E550i-B2 Sound - No Video Problem

This was awesome. However, mine broke on the power board side. I removed the power board and the driver board as a pair and touched up both sides.

Once again thank you very much.

[SLK001]

I recently acquired a 55" Vizio Smart TV with intermittent video (actually, no backlight). The previous owner said that it would work for a while, then NOT work for days. When I brought the TV home, everything was working properly. After a few days, the backlight just went dark. A check of the power supply showed ~21V being properly output - but not getting to the LED driver board - connector CN202 had no voltage on it.


https://www.badcaps.net/forum/attach...1&d=1461431331

Removing the PS board revealed that the backside of connector CN202 had EVERY SOLDER JOINT FRACTURED!

https://www.badcaps.net/forum/attach...1&d=1461431331

After some rework of the solder joints to remove the lead-free solder and put down regular 60-40.

https://www.badcaps.net/forum/attach...1&d=1461431331

When reassembling the PS board back into the chassis, EXTREME CARE should be observed, since the CN202 connector requires a LOT of force to properly mate. If you do not support the pins during mating, THEY MAY FRACTURE AGAIN! So, do NOT use pressure on the board, but put the pressure on the PINS! The joints are fracturing because the PS board is single-sided and only have support on the metal side.