Have a 65UH5500 4K UHD Smart LED TV - 65" that went black while watching. Light will flash about 3 to 4 times and turns off. L

[patsyhutchins]

PROBLEMS WITH MY TV Have a 65UH5500
4K UHD Smart LED TV - 65" that went black while watching. Light will flash about 3 to 4 times and turns off. LG TV sigh will briefly flash when you unplug and turn back on.Replaced Main board and power board . STILL THE SAME . Any ideas ? TV is 2 years and 3 months old . NO SOUND

 

[helpstar]

most likely defective TV

RMA it if it´s still under warranty

 

[patsyhutchins]

NO warranty, One year is all they have.

 

[helpstar]

is the new or old power board supplying the correct voltages to the mainboard?
most likely the voltages are written near the connector to the mainboard like here:
https/www.youtube.com/watch?v=kbjNq1AyF00

 

[vangundy.danielle]

I was able to finally fix ours by just switching to a different HDMI port on the side!