Electrical Interference

• A Panasonic TV usually makes a low humming sound indicating that it's on. However, in many cases, a loud and annoying humming sound is caused by electrical interference from electrical appliances such as fluorescent lamps, light dimmers, thermostats and medical equipment. According to Panasonic, when noises occur due to static electricity, the TV might stop operating for the protection of the device. Electrical interferences can not only cause humming noises, they can distort sound and image quality. To solve this problem, move such appliances away from the TV.
  
  

Cable Connections

• Panasonic TVs can work with a variety of third-party devices such as DVD and Blu-ray players, video games and satellite receivers. If these devices, especially the audio cables are improperly connected, the TV might produce annoying humming, feedback sounds. Connecting audio cables from a third-party device to the TV may vary with different devices and the type of cables being used, so refer to your device's manual if you're not sure how best to connect the device. In addition, check cables for wear and tear. Broken cables can also cause feedback, so replace them when necessary.
  
  

Tips and Recommendations

• If the humming or buzzing noise persists, the third-party device ' using with your TV may be the problem. One way you can determine this for sure is by disconnecting the device. If the noise goes away, the third-party device is likely the problem. If such is the case, refer to the device's documentation for the proper troubleshooting and repair tips.
  
  

Warnings

• To avoid power, sound or display problems, install your Panasonic TV in accordance with the manufacturer's recommended guidelines. Panasonic TV's vary in size and performance, so use the recommended pedestal or stand guidelines found on the device's documentation. In addition, don't place the TV on a sloped or unstable surface. To avoid causing internal electrical damage, don't place containers filled with liquids on top of your TV. If water gets inside the TV, unplug the power cord immediately to avoid short-circuits that can cause a fire. If your TV still isn't performing well, you may need to contact Panasonic support for additional troubleshooting and possible repairs.