How do I test my LCD TV backlight inverter?

Turn on the LCD screen and wait for the Multimeter to take a reading. If there is absolutely no activity on your multimeter, that means your inverter board is bad. Turn off your multimeter and put it away after you have finished testing the inverter and then power off your LCD screen.

How do I test my screen inverter?

Slowly move the leads of the meter around the edge of the laptop screen. The inverter is located in different places on different models. Look for any reading on the multimeter. If there is no reading, the inverter is broken.

How do you test a TV backlight?

To see if your TV’s backlight is causing the problem, make sure your TV is on, and turn off the lights in the room. Shine a flashlight on the screen to see if there’s a picture. If you can see a picture with the flashlight, then your TV’s backlight is burnt out.

How does an LCD inverter work?

A screen inverter is a small circuit board in a laptop computer that passes a power current from the body of the machine to the attached liquid crystal display (LCD) screen. It works by turning a direct electrical current from the motherboard into an alternating current.

Do LCD screens have a inverter?

Inverter is a pen-sized board that is usually placed on the bottom of the LCD screen, either in the same case with the LCD screen, or above the keyboard. The inverter is one of the key parts within a display; it allows for the laptop’s display to be lit by providing power to the screen’s backlight.

How do I know if my TV backlight is bad?

As backlight failure is a very common issue, this is the first thing to test. To do so, the easiest way is to power on your screen, put a flashlight very close to it and check if you can see the image through. The image would be very dark, like turning the brightness of the screen very very low.

What causes TV backlight failure?

The Most Common Causes of Display Failures The LCD screen – LCD failure can occur from drop damage, water damage, or it can simply be the result of a defective part. The backlight filter – When a short in the backlight circuit occurs, the thin wire inside the filter breaks, severing power from the backlight LEDs.

What is the backlight inverter board in a TV?

The Backlight Inverter Board varies in size and length inside an LCD TV or LED TV. Generally speaking, the Backlight Inverter Board may appear as a standalone circuit board by itself, integrated together with the Power Supply, or integrated together with the Main Board.

How to judge the quality of LCD inverter?

However, if the LCD inverter has more than one high voltage transformer then it would be easy to judge the result (comparison test). Some designs only have one transformer but you still can compare the winding because the above transformer have one primary winding and two secondary windings

How many LED lights can the inverter tester read?

The tester could read up until 2 or 3 LED lights only. However, if the LCD inverter has more than one high voltage transformer then it would be easy to judge the result (comparison test).