Why TV Making High Pitched Noise and Won’t Turn On?

TV making high pitched noise
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TV makes noise during its normal operations as its components expand when the TV is powering on. The usual voices include the clicking, humming, and humming of the TV parts. High pitched noise in the TV that is not turning on results from extreme damages with capacitors and the power supply, which requires replacements.

Replacements help avoid further injuries that will spoil the TV’s best parts, damaging its operations incurring higher charges for repairing. Therefore the article shows causes of high pitched from television and did not turn on and solutions to the grounds. In addition to that, there are steps to fix the problems with the TV when making noises.

Causes and solutions to high pitched noise in a TV and won’t turn on

When turning on the TV and it makes high pitched noise without turning on, it has a problem with its capacitors and the power suppliers. With a new TV which always has a warranty, contact the manufacturer for replacement or repairs. The significant causes of noise in a TV that is not turning on are;

· Capacitors

Tv Capacitors

Capacitors store electrical energy for a while before transmitting it to the circuit. When turning on the TV from the socket, the power flows to the capacitor, which receives charge then transmits the power to another capacitor until it reaches the circuit. If the capacitor is faulty, the transmission of energy terminates as there will be a lack of energy at all capacitors to turn on the TV entirely. Still, it starts making high-pitched noise due to a lack of enough power.

Steps to fix capacitors in a TV that makes high-pitched noise and won’t turn on

Steps to fix capacitors

 The steps below show how to fix a TV that is making noise and is not turning on. In most televisions, it is the capacitor that causes such, and therefore you need to change the capacitors or repair them. Ensure to handle the television with good care since the screen is prone to damages;

1. Confirm the state of the television, and if it has been damaged or the screen is broken, you have to find a way of repairing that by asking a professional. But if it was working before and it is not turning on today, you can continue and fix the problem yourself.

2. Collect all the requirements for fixing the capacitors like the screwdrivers, pliers, and other tools for fixing. Buy a new replacement capacitor from the manufacturer of your television to get an original one that will be compatible with your television.

3. Collect other extra tools that are not necessary but can make work easier when replacing the capacitors.

4. Please switch off the television by putting it off in the sockets and unplugging the power cables at the back end of the TV.

5. Displace the television from the TV stand by unscrewing it from the stand and removing it from the wall to fix the capacitor in an open space with enough light.

6. Place the TV on the surface by laying it flat and placing it upright as it usually stays when you are watching to avoid interfering with its screen and other delicate parts from getting damaged.

7. Unscrew the screws from the TV case at the back end using screwdrivers to open the case so that you can access the capacitors.

8. Locate all the screws hidden in the TV, making it hard for the case to stick hard, and remove them.

9. Remove the TV case gently from the television and place it in a safe place. Have a look at the TV components to help reassemble the parts after fixing the capacitor.

10. Disconnect all the wires that are connecting the TV with the circuits and remove the screws holding the circuit board to remove it

11. Locate the faulty capacitors by looking at their colors in the circuit board as the bad ones are visible and some may bend as some may be leaking, causing reactions that change their color in the circuit board.

12. Remove the capacitors gently using the iron without forcing it to pull out.

13. Fix the new capacitor in the position of the older one considering the part of the terminal by fixing them precisely in their position since mistaking at this point can cause the television to fail to turn on completely.

14. Connect the wires back to their position and fix the screws.

15. Place the TV case to cover the capacitors and the circuits in the TV and fix all the screws.

16. Turn on the TV to check if the noises are still there.

· Power supply

The tv Power Supply

The power supply on a TV converts alternating current from the socket to a direct current that powers the TV. The TV and the power supply connection are through relay switches that turn on or off according to electrical strength. The relay switch is the one that causes noise in a TV during the activation of the relay switches, and the power supply is not enough.

Steps to fix the power supply for a TV that makes high-pitched noise and won’t turn on

Before fixing the power supply, check if it is the cause of the noise in your TV by turning on the TV. Try turning it on a couple of times before deciding on the repairs on the power supply. Take great care when handling the TV by following the manufacturer’s instructions on the measures when holding power cables.

i. Ground yourself under an antistatic wrist strap to protect you from electrical dangers.

ii. Please switch off the television by unplugging the cables from the wall and give it some time to cool.

iii. Connect the television back to the power and turn it on and ground the tv using a surge protector for the safe flow of electricity.

iv.  If the TV fails to turn on and still makes noise, call a technician to troubleshoot the TV properly since you cannot know all sources of errors with the power supply.

Types of noises the TV makes and won’t turn on

1. Clicking

Clicking noise in a TV is from the relay switch in the power supply that suddenly gets activated when powering the TV. The relay switch makes a clicking noise when power flows from the power supply to the TV capacitors.

2. Humming

Humming is normal noise in the TV since the TV hums when turning on due to air circulation by the fan and the exchange of air in the air filters when cooling the TV.

3. Crackling

TV crackles when turning on as its components expand to the electrical charge from the power supply. The process of expansion of the cables and other parts makes the TV make noise. High pitched noise may result from damages to the power supply.


The article above shows the causes with their solutions about televisions that make noise and won’t turn on. Before providing solutions to the particular causes, read the manufacturer’s instructions and get a good understanding of the TV parts. Please take note of the TV parts when disassembling them so that it becomes easy to fix them when reassembling the TV after repair.

Finally, consider contacting a professional to repair the parts or replace them if you do not have a good idea on the TV to avoid disconnecting permanent parts in the TV. Follow the steps in the article carefully to troubleshoot your TV.

Related Post: Vizio TV makes loud noise and shuts off-causes and how to fix.

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