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How to Fix High Pitch Noise from a TV

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Written By:

Lawrence Bonk
Updated January 21, 2023

It might be a little frightening when your TV makes a high-pitched noise. However strange as it may sound, most manufacturers say you shouldn’t panic when this happens. A high-pitched sound produced when turning on your TV is completely normal.

KEY TAKEAWAYS:

  • All TVs make some noise that can be heard in a quiet room with your ear placed on the unit. This is quite normal.
  • The high-pitched sound produced when you turn on your TV shouldn’t be too loud.
  • TV sounds will be amplified depending on how the unit was installed. For example, glass, wooden, or wall brackets where the TV is positioned can increase the tone of the noise.

This sound is produced by electrical charges made by the TV to power the pixels that create the images displayed on your screen. It is essential to note that the high-pitched sound produced when you turn on your TV shouldn’t be too loud either that it is audible when the TV volume is set to normal levels. Additionally, if you are getting no sound from TV there could be a different problem.

An unusually high-pitched noise from the TV could also mean a hardware malfunction. Fortunately for you, we have compiled a step-by-step guide on how to fix high-pitch noise from even the most highly-acclaimed TVs.

What causes a High Pitch Noise in a TV?

Several things could lead to a high-pitched noise from your TV. Different components inside the unit can produce these noises. These include the deflection yoke, horizontal flyback transformer, and horizontal deflection circuits, among other components. The connections to the tv such as the HDMI port may also be faulty but you can always learn how to fix an HDMI port on the tv.

Troubleshooting a High Pitch Noise from a TV

A high-pitched sound might not necessarily point towards a hardware fault in your TV. However, before getting to that conclusion, the following steps will help you fix the issue.

  1. First, unplug any devices that might be connected to your TV unit and pause to listen if the high-pitched sound disappears. If it does, you’ll have to plug in one input device at a time to find the source of the noise. It should be noted that a faulty connection could be responsible for multiple problems that can arise with your TV like showing a black screen. Or if you are watching something with a soundbar, a faulty connection could cause the sound to be delayed on the TV.
  2. If the noise fails to go away, scan around the TV for obstruction to vents on the rear of the unit. Also, wipe off any dust or debris accumulating on the air vents with a soft dry cloth. Make sure the unit is disconnected from the power source during this process.
  3. A high-pitched sound from the TV will also be amplified depending on how the unit was installed. Glass, wooden, or wall brackets where the TV is positioned can increase the tone of the noise. Position your TV on a rubber surface to help muffle the sound.

Ideally, all TVs make some noise that can be heard in a quiet room with your ear placed on the unit. This is quite normal.

  1. If you have a home theater system or a soundbar connected to your TV, the high-pitched noise gets louder when you increase the volume. You will need to check your connections, including HDMI or RCA, for faults or physical damage. If you notice any wear and tear, replace them with higher shielding options.

If you have tried all the above options and you are unable to tone down the high-pitched sound, it could be an issue with an internal hardware component. You may want to try fixing the resolution on the tv too. But if it fails, it is essential to seek assistance from the manufacturer on your TV warranty status.

F.A.Q.S

What causes a high-pitch noise in a TV?

Several things could lead to a high-pitched noise from your TV. Different components inside the unit can produce these noises. These include the deflection yoke, horizontal flyback transformer, and horizontal deflection circuits, among other components.

Could a high pitch noise mean hardware failure?

A high-pitched sound might not necessarily point towards a hardware fault in your TV. However, an unusually high-pitched noise from the TV could mean a hardware malfunction.

A high-pitched sound increases with soundbar volume. What does it mean?

If you have a home theater system or a soundbar connected to your TV, and the high-pitched noise gets louder when you increase the volume; you will need to check your connections, including HDMI or RCA, for faults or physical damage.

Can worn-out TV cables cause a high-pitched sound on a TV?

Yes. Worn-out TV cables will lead to signal issues, leading to strange buzzing and popping and high-pitched sounds.

Do TVs make any internal sound?

Ideally, all TVs make some noise that can be heard in a quiet room with your ear placed on the unit. This is quite normal.

STAT: According to statistics, the electronic and computer repair industry in the U.S has fallen slowly between 2016 and 2021. The fall will continue with an annualized 2.3%, including an anticipated 6% decline in 2020 due to the effects of the pandemic (source)

Lawrence Bonk Profile image
Lawrence Bonk
Lawrence Bonk is a copywriter with a decade of experience in the tech space, with columns appearing in Engadget, Huffington Post and CBS, among others. He has a cat named Cinnamon.