hg49nj477mfxza HIT BY LIGHTING⚡

[budm]

Re: hg49nj477mfxza HIT BY LIGHTING⚡

I used these 2 as ground pts. For some reason if i use the voltage regulator heatsink as a ground, i get the proper 160volts on the big capacitor 100uf 450v.
If i use the grounding tab i don't get any proper voltage on the same cap for some reason.

You have to use proper ground for your meter depends on what circuits you are working on.
You have Earth safety ground, Hot side circuit ground, Cold side circuit ground.

HeatsinK is connected to hot side circuit ground, you are making measurement in the cold side of the circuit so you have to use cold side ground, the chassis is connected to cold side ground when board is bolted down to the chassis.
Do not touch the heatsink with your hands or body!

BTW, since these TV's are from holtel, the backlights is probably driven to the max which will shortened the life of the LED's.

Power supply board: https://www.shopjimmy.com/samsung-bn...ply-led-board/

[Super360]

Re: hg49nj477mfxza HIT BY LIGHTING⚡

I bought a used power board on e-bay will report back. I think a lighting strike is out of my scope of knowledge on fixing tvs. It gets hard to fix these things when there is no obvious damage and probably knocked out a little ic. Thanks everyone for the help.

[Super360]

Re: hg49nj477mfxza HIT BY LIGHTING⚡

UPDATE Its's all fixed, Just needed a used 13$ power supply on ebay and it works like a charm now.

[budm]

Re: hg49nj477mfxza HIT BY LIGHTING⚡

Thanks for the follow-up, make sure to turn down the backlights down to as low as possible on all inputs and all modes to extend the life of the backlights.

[Super360]

Re: hg49nj477mfxza HIT BY LIGHTING⚡

Thanks for the follow-up, make sure to turn down the backlights down to as low as possible on all inputs and all modes to extend the life of the backlights.

WILL DO BUD