Vizio-D50u-D1 Pulsating Backlights

[csmith]

This Vizio came in the shop with no backlights. Replaced all the strips with replacement from Shop Jimmy. Set now has backlights but lights pulsate on left side. Half the screen brightens up then goes to normal then repeats.
Am I looking at a defective strip? Thanks in advance.

[EazyBone]

Defective strip, loose connection PSU issue. Hard to know.

I usually test them before assembling it all back together and make sure voltage is correct on all. Some tvs you can plug in while disassembled and the lights will come on, Samsung you need to disc the main board. Hisense disc the TCON at main.. etc to not short out the other components. I believe Vizio may work also but you need to hit the power button on the TV because the remote obviously won't work as it's disconnected. It gets bright 😎 😎

You can try the led tester before disassembling it all, just disc the power board first. If ones defective it'll be lower then the others or pulsate

[Diah]

LED units depending on currents not Volts.. i would inspect one LED original and compare it with diode measurements with replacement..

[csmith]

Today reseated connectors on backlights and now all is well. Take a break when your tired. As these sets will drain your energy. To confident put it together without checking which I normally do. Thanks Eazybone and Diah.

[EazyBone]

Agreed. These Vizio's got so many damn screws and clips for the white deflector paper.. exhausting