The tv was working find and i turned the tv off friday night. the next morning it would not come on I checked the power and made sure it was plugged in. why would it work ok one day and not come on th

Plug the power cord directly into a wall power outlet, and make sure that the standby light is lit (turn it on/off manually to see if anything changes). If there isn't any light, then it's most likely broken.
If the TV works again, being plugged into the power outlet in the wall, then the problem is with the cable box (i bet you figured that out too).

THIS IS NORMALY CAPACITORS IN THE POWER SUPPLY THAT NEED REPLACING

Check the Ac power cord,Fuses or the power supply module.

Check the Socket make sure that it has power plug a cell phone charger into it to check, if that doesn't work check all connections on the TV also try the remote to power it on if that doesn't work try the power button at the TV if that doesn't work try the input channels.

take your tv to technician who can check your power supply, if your power is coming on and off, than a problem is not as big. firstly let him check a ht of a supply constantly, your supply is cutting.

CHECK THE SIMPLE THINGS --MAKE SURE THE PLUG IS STILL PLUGGED IN AC...IF YOU HAD SOME POWER INTERUPTIONS ...MAY HAVE BLOWN THE MAIN FUSE BY THE POWER CORD.DO YOU SEE ANY LED LITES ON THE FRONT OF TV..POWER INDICATOR??? .REMEMBER ,ALWWAY S UNPLUG THE TV IF YOU TAKE THE BACK OFF...TUNICA

no sound, everything was working fine the night before. woke up the next morning, and turned the tv on, and there was no sound at all. nothing from the TV, DVD, and nothing from the Computer. Please help. [email protected].

are you using original xbox games or 360 games

unplug. leave off for a few minutes. small chance it will reset.
also, it might have lost its input setting and is no longer looking at the input you send the source signal to.
good luck
mark

Do what I am going to do. Take it back. Mine is only a day old.