Panasonic produces large-screen television sets using LCD, plasma and rear projection technology. Big-screen Panasonic sets can suffer from a range of problems like power failures, overheating and image interference. Many of these issues can be dealt with through regular checks and maintenance work. Recurrent failures may require the help of an experienced repairman or Panasonic customer support.
Put your hand on the back of your Panasonic TV to check for overheating, if your set keeps switching itself off without warning. Overheating can also result in distorted image quality, a problem that usually afflicts large-screen rear projection units. Many Panasonic sets come equipped with a safety feature that switches the power off if the set gets too warm.
Check the cooling vents located at the rear of your Panasonic rear projection unit. Vents can collect dust and dirt, resulting in the fans becoming blocked and failing to work properly.
Remove dirt from the vents with a damp, clean cloth. Ensure the air conditioning is kept at adequate levels in the room where your TV is located. Keep the drapes shut on hot, sunny days to keep the room cooler.
Adjust the aspect ratio on your Panasonic big screen TV, if you see black or grey bars at the top and bottom of images on screen. This problem often occurs with large widescreen Panasonic LCD and plasma sets. These sets are designed to produce images in a 16:9 widescreen picture ratio. Television programs are usually broadcast in a picture ratio of 4:3, resulting in the black bar problem.
Push the Menu button on your remote control. Select the "Picture" option from the on-screen display, then the 16:9 picture format, if not preselected. Standard definition broadcasts will now be stretched to fill your screen.
Push "Menu," then "Picture Settings" on your cable box remote control. Also ensure your cable box is set to 16:9 picture format. Contact Panasonic customer support directly if black bars remain after changing the settings on your TV and cable box.