There may be up to 2 status indicators on your TV.
If the lights are not on, push the Power button on the remote.
4. Check Input Device
Sometimes, it's not a problem with your TV, but rather with the device sending pictures and sounds to your TV.
Try testing another device, first. For example, if you're watching cable, try switching to DVD or Blu-Ray, and play something there. If that works, it's most likely not a problem with your TV, but rather the device that's sending the programming your TV is showing.
Try turning your cable, DVD, or Blu-Ray player off, waiting a few moments, then turning it back on, and try again.
If one device works fine (say, your DVD or Blu-Ray player), but another does not (say, your cable box), it would be best to contact the provider of the device that isn't working.
5. What's next?
6. Test Remote
7. Replace Batteries
If your remote is unresponsive or responding intermittently, try the following:
Open the battery cover and remove the batteries.
Insert the batteries observing the proper orientation as indicated in the battery compartment.
If there is no improvement after reseating the batteries, try replacing them.
8. What's next?
9. Check Power
Make sure the TV is plugged into a working power outlet. Bypass any power strips for troubleshooting purposes.
Press the power button on the unit itself or on the remote to turn it on.