Toshiba offers a line of plasma, LCD, LED and 3-D televisions designed for watching movies, shows and sports, as well as playing games. Occasionally, your TV may make a high-pitched noise during operation. This does not always indicate a malfunction with the TV. Often, you can make the noise go away by adjusting the TV's cables or settings.
Transformers or Cooling Fan
Your Toshiba television contains hundreds of electrical components and parts. These components work together to display a picture, emit audio and cool the TV so it does not overheat. When the TV gets hot, the cooling fan works harder to keep it cool. This results in a high-pitched or buzzing sound. The TV's transformers may also make a sound. The sound is more common if you operate the TV at a high altitude because the components need to work harder than normal.
Toshiba televisions support several types of cable connections, including HDMI, optical audio, component and standard A/V. If you do not connect the audio cable properly, a high-pitched or abnormal sound often results. Check all cable connections and ensure that no cables are loose. Standard A/V cables have three jacks that you must connect to receive a picture and sound. The red cable lets you hear audio through the right speaker, and the white cable provides sound through the left speaker. If you have an optical audio cable, connect it to the television's "DIGITAL AUDIO OUT" terminal.
If you only hear a high-pitched noise when watching a certain channel, try changing the channel. Occasionally, TV stations experience broadcasting errors that result in anomalies such as a poor picture or sound. In many cases, the high-pitched noise will go away when the TV station corrects the problem.
Your Toshiba television features multichannel TV sound, also called MTS. Some TV channels offer a secondary audio stream that includes music or another language. When you put the TV in second audio program -- SAP -- mode, you can hear this audio stream if the channel you are watching supports it. If you hear strange or abnormal sound with SAP mode enabled, the station may not support secondary audio streams. Access the TV's audio settings and change MTS from SAP to stereo mode.
- Photo Credit Comstock/Comstock/Getty Images