TV problems are easy to identify. It’s either a cracked screen, a failed mainboard, or a short resistor or capacitor. However, when you turn on your TV and it doesn’t come on, half the time, it’s a failed mainboard unit. Unfortunately, not many TV owners know how to repair a TV mainboard, especially for the modern top-rated TVs. Don’t panic yet if you have no clue, we have compiled a step-by-step guide on how to repair your TV mainboard.

KEY TAKEAWAYS:

  • A TV mainboard has several technical names, including a motherboard, logic board, electronic board, circuit board, main panel, and scaler board.
  • The easiest way to identify your mainboard is to locate what holds the audio and video inputs.
  • The primary function of the mainboard is to capture both video and analog signals and convert them to digital signals that’ll be transmitted to the T-con board.

What is a TV Main Board?

A TV mainboard has several technical names, including a motherboard, logic board, electronic board, circuit board, main panel, and scaler board. Locating your TV mainboard is quite simple. The easiest way to identify your mainboard is to find what holds the audio and video inputs.

The primary function of the mainboard is to capture both video and analog signals and convert them to digital signals that’ll be transmitted to the T-con board.

Troubleshooting a TV Mainboard

If your TV doesn’t come on, or the coloration has an electric problem, you might want to pack it up and send it back to the manufacturer for replacement or repair. If it’s a signal issue then you may want to replace TV ears replacement tips. Otherwise, you have to repair the mainboard yourself.

Sending your TV to a manufacturer-authorized repair center can be pricey, depending on the problem. There are also additional shipping and handling charges that could quadruple the total cost.

Some typical faults with the TV mainboard include; no color on the monitor, vertical or horizontal lines, or sometimes no sound output.

Troubleshooting and repairing your TV mainboard is moderately easy. All you need is a multimeter, screwdriver, and replacement parts.

It is essential to note that occasionally your TV might display problems similar to a faulty mainboard due to a software issue that needs updating. In other cases, it may be the power board but you can also find out how to repair your TV powerboard.

How to Repair TV Mainboard

Repairing your TV mainboard is relatively easy. All you need is a multimeter, screwdriver, and replacement parts.

  1. First, download or request the schematic diagram of your TV’s circuit board from your device manufacturer.
  2. Unplug and unmount your television from the wall and place it face-down on a flat surface. Make sure to put a towel underneath to prevent scratching the display.
  3. Ensure you are grounded to remove the static charge. You can do this by touching a metal object.
  4. Start unscrewing the back panel of your TV based on the diagram that’s on the user manual. You need both a flathead and a Philips screwdriver for this step.
  5. Connect the multimeter and test the corresponding ports. They usually are color-coded.
  6. Check the mainboard for any visible signs of damage if you can identify any swollen, warped, or burned areas that might indicate a power surge.
  7. Use the multimeter to check and check for resistance. Then, touch the multimeter’s leads on either side of the component, comparing the readings you get with what’s displayed on the schematic.
  8. Do this for each component on the mainboard until you find the source of the fault. Then, replace the faulty part and reassemble your TV.

F.A.Q.S

What is a TV mainboard?

Also known as the motherboard or electronic board, it holds the audio and video inputs and outputs.


What is the function of the TV mainboard?

The primary function of the mainboard is to capture both video and analog signals and convert them to digital signals that’ll be transmitted to the T-con board, projecting it on the screen.


How will I know my TV mainboard is faulty?

Some typical faults with the TV mainboard include; no color on the monitor, vertical or horizontal lines, or sometimes no sound output.


Is it possible to repair a TV mainboard unit?

Yes. With a little technical know-how, a multimeter, a schematic diagram, and a screwdriver, you can easily repair your own TV mainboard.

Is it worth it repairing my TV mainboard at home?

Depending on the cost of repair, additional shipping and handling charges, your technical know-how, your interest in DIY, you can easily fix your mainboard.



STAT: The U.S connected TV penetration rate is at an all-time high in 2021. At least 82% of Americans own a TV connected to the internet. Moreover, there’s been a steadily consistent growth from 2014 to 2021, except for 2019 (source)

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.

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *