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TV Power Switch Questions

Are you facing power issues or problems with the power switch? Do you need to reset the switch? Power switches on TVs are common and necessary components. They act as a facilitator to power the TV and are not necessarily a major component by themselves. Usually the power switch is present on a board that in turn connects to the mainboard. Problems with this switch are closely related to the power supply and mainboard which has a tendency fail or face problems especially when there is a power outage. Read below for a few questions Experts have answered for TV users.

What can be done if the Trinatron TV does not turn on when the power switch is pressed or remote is used?

Case Details: Power light blinks six times and goes off

The blinking of the power light is indicative of a fault with the “D” board or a fault in the processor. The TV may need to be serviced to fix this problem. However, you can try attempting a reset by first unplugging the TV from power. Next, press and hold the power switch on the TV for 10 seconds before releasing. Plug the TV set back in to power and ensure the power cord is connected tightly at the TV as well. Press the power switch again to check for signs of life on the TV. 

What is the reset procedure involving the power switch when a TV fails to turn on?

The below reset process works as a possible fix as well as a diagnostic evaluation:

  1. Unplug the power cord from the TV.
  2. Wait for at least 60 minutes (1 hour).
  3. Press and hold the power switch or the standby button on the TV (not remote) for 60 seconds.
  4. Continue keeping the power switch pressed while re-plugging the power cord and wait for another 60 seconds. It should be noted that while plugging in, ensure it goes into the wall directly bypassing any power strips or surge protectors.

How to test a Sony TV which is having trouble turning on?

Typically, it is the two circuit boards, namely power supply and LD board (at the top left rear of the TV) which need to be tested. To begin with check for 24V DC going to the LD board when the TV is powered up. If 24V DC is not present when the power switch is pushed, unplug the TV power cord from the wall outlet and using a meter, measure the volts (black lead on chassis for ground and red lead on 24 V pin). The power cord should be plugged in and power switch pressed to check for volts. If there is none present while the power switch is pressed, most probably, the power supply board is defective and needs to be replaced.

What does it mean if a ‘click’ is heard when the power switch is pressed on a KDS TV?

Case Details: Lamp bulb was replaced and green light blinks continuously

It could be the TV’s ballast facing problems in firing the new lamp. This can be the case if the new lamp is not OEM as aftermarket lamps have a tendency to fail. It may be a good idea to return or exchange the lamp. You can also try replacing the ballast.

Why is the LG TV failing to turn off when the power switch is pressed or while using the remote?

This is not a common problem and could be a result of one of the two possibilities. The main board which communicates to the power board to turn on when the power switch is pressed, could be faulty. The power board could be confusing voltage ripple caused due to poor filtering, as a power on command. This is usually due to weak or vented capacitors which worsen over time.

As seen above, TV power switch problems concern a deeper issue which needs some amount of troubleshooting. Usually it is the power supply board or another internally connected issue. Power switches on TVs are the starting point to know if a problem exists or not. Answered above are some of the questions or problems that arise. If you need answers to any particular TV power switch issues, ask Experts and get customized answers from the comfort of your home. 

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