Rear-projection televisions, or RPTVs, are some of the best bargains available for high-definition televisions. Unfortunately, they have potential problems. Learning some basic troubleshooting might prove useful if you own an RPTV.
Before trying any more elaborate troubleshooting, check the basic fixes first. Make sure the TV is properly and securely plugged in. Plug another device into the outlet to make sure the outlet is good. Make sure you have fresh batteries in the remote. Finally, check all of your cables and connections to be sure they're properly attached and connected.
Rear-projection TVs have a lamp that provides light for the image. One of the most common problems for an RPTV is a burned-out or improperly attached lamp. Check the lamp to make sure the bulb is still good, and make sure the lamp cover and lamp itself are correctly installed. If the lamp is bad, replace it soon. Often RPTVs have warning lights to inform you of lamp problems. Consult your owner's manual to see what those lights mean.
Rear-projection TVs do not perform well if they get too hot. If your TV is shutting off automatically, it may be overheating. Make sure any ventilation ports on the TV are clear and free of debris and dust. Allow ample room around the television for air flow. Also, make sure the temperature in the room is around 72 degrees. A hot day when you decide not to run your air conditioner is not the day to watch your rear-projection TV.
Make sure the settings on the TV are correct. Check the brightness and contrast to ensure they're not set too high or too low. Adjust the colors on the TV. Make sure the TV's speakers are not turned off and that the volume is not muted or turned all the way down. Consider having an ISF calibration done on your television.
The Last Resort
If all else fails, contact the manufacturer of your rear-projection television. Locate your owner's manual or find the company's site online. Under no circumstances should you attempt to open up the main body of your television, as this will void your warranty.