Tv wont turn on worked fine last night

u have a bad mainboard or power supply board most likely the mainboard

remove all the electrical wire connections from the back of the tv .remove the power plug from the electrical outlet and wait for two minutes and replug the wire and then ckeck.it should work.
reply.

Try unplugging and replugging after waiting.

Unplug 20 minutes. Make sure there is adequate ventilation around the set.

Try with the original manufacturer remote to view setup menu.

Power outages come at night. This sometimes resets the TV and other devices. .

Check the fuse on the power board. If ok change the power board.

I soudcs like the backlight inverter board is bad or the power supply is npt supplying 24vdc to the inverter board.

Sounds like the power supply.

check there is a problem with SMPS and fuse/power socket problem thank u

Replace Lamp.

As far as fixing goes, you might as well get a new TV... Unless its a LARGE EXPENSIVE HOLY $%^# TV, It will cost more to fix, than to just buy a new one, unless its under warranty, which being an older model as that (or so im reading) It may not be covered.

Try unplugging the TV, and while unplugged, hold down the power button for a full minute (yes, with the plug NOT in the wall) after a minute, plug it back in, and try. Its a hard reset. If it still does not work, and you've tried different outlets, It's probably a repair issue, and you'll need to get someone to fix it, or just junk it :-/