How To Test Laptop Screen Inverter

How To Test Laptop Screen Inverter
  • Jan 11th, 2024
  • Ranjeet Singh
  • How To
    • Share :

Hello Friends, I hope you are doing well!

The most important part of your laptop's LCD screen assembly is your LCD screen inverter. Inside your LCD screen, the inverter is a tiny circuit board that provides power to your LCD's backlight gadget. The LCD screen inverter illuminates the LCD screen, which enables you to see images, illustrations, and videos on your screen. If your LCD screen inverter is not working correctly, you will see a dim or black LCD screen.

If you want to test your laptop LCD inverter and don't know how to do it, you are at the right place.

This blog will tell you how to test a laptop LCD screen inverter.

Your latest laptop for Circuit makers should be powered up if you are unable to get anything on display and only see the actual light lighting up; if you are unable to see much on the screen and if you look closely, you will be able to see a slight display or a little flash on the net. In this case, we suggest you turn off your laptop. Then, boot back up into the actual BIOS and try to get the BIOS to boot up on the screen. Then get a torch and flash it onto the vidscreen to see if you can see any display now.

Read Also: Tips to Take Care of Your Laptop During Summer

Sometimes, you don't see anything but only see a convenient and clean faint picture. You can see there is a little bit of a display there if you use the camcorder with the light on it. We recommend carefully removing all the actual bezels on the front. Just interfere around the show a little by removing the solid bezel. After going inside, look at the fundamental inverter part and the cable where the line goes outside. If there is no display, we must determine whether the laptop's inverter or backlight is gone.

A little lamp kit should be used as it has a customization kit with LED lights. Using any laptop, you can see the cable inside the inverter. You can bypass the inverter to make sure whether the inverter is broken. You can use little connectors and a 12-volt power source for lighting up the lamps. You can then plug out the inverter and plugin into your little device from where you go to your 12-volt power adapter and into the wall. If you cannot get a display, the lamps are wrong; however, if you get a show, it will be the actual inverter, which is terrible.

Then, go to the 12-volt power adapter in the wall. If your lamps illuminate, then your actual inverter is terrible. Then switch on the lamps, and you will see a very dim light from the natural light from the tubes. In this way, you can see the display. Now you know the true inverter is terrible, and the line is good.

Now, take a look at another screen. You can use a known good screen of another laptop to see whether you have a display there. Use multimeters for the actual inverter to know whether it has failed, or you can use a known suitable inverter. These are some of the different ways of testing LCD Screen inverters. We are telling you one of the quick and simple ways of testing LCD screen inverters.

Read Also: How to Fix Distortion and Discoloration of Your Laptop Screen

When you look at the switch, you can see the light coming on and notice that it is either not good or bright. From this, we know that the lamp is working, and the LCD is also good. It is a good sign that the actual light is going on. It is not good if the true light is not on the lamp.

The inverter gets its power from the motherboard. However, there is no light on the screen. It will be either a failed backlight lamp or a bad inverter.

Use a known good backlight lamp for testing.

1. unplug the screen backlight cable from the right side of the inverter.
2. Then connect a known good backlight lamp.

Then turn on your laptop.
1. If your test backlight turns on, the lamp inside the screen is terrible. In this case, replace the net and the backlight lamp, which is neither easy nor recommended.
2. If your test backlight doesn't turn on, then you most likely have an inverter failure. We recommend that you replace it and test the laptop again.

Read Also: How To Troubleshoot and Fix Blue Screen?


You can quickly test your laptop's LCD screen inverter using this quick and easy method. We hope this blog will be helpful for laptop users who don't know how to test their LCD screen inverters.

Here is the Lenovo Authorised Service Center in Delhi

Here is the Lenovo Authorised Service Center in Noida

Here is the Lenovo Authorised Service Center in Ghaziabad

Here is the Lenovo Authorised Service Center in Faridabad

Here is the Lenovo Authorised Service Center in Gurugram

Frequently Asked Questions

Laptop Repair | Computer Repair | Printer Repair

The backlight for the LCD screen in most laptops is a cold-cathode fluorescent lamp, which is basically just a small fluorescent tube. Just like fluorescent room lighting, they eventually burn out. Unlike room lighting, they are not made to be replaceable.

The liquid pixels within an LCD device don't illuminate on their own. Rather, they require illumination from a separate component, known as a backlight. The bottom line is that a backlight is an essential component in LCDs. Without a backlight, an LCD display device will remain black, rendering it unviewable.

To check if the PC has a backlight keyboard, check the keyboard Space button or Esc button. To see if a specific model has a backlight, search for backlight in the User Guide or Hardware Maintenance Manual (How to find and view manuals for Lenovo products - ThinkPad, ThinkCentre, ideapad, ideacentre).

Turn your television on and shine a flashlight on the screen to look for an image. If you can see an image, then you likely have a bad inverter that needs replacement. The inverter board keeps the backlight of the television on.

Desktop and laptop computer LCD monitors sport a long light bulb to display the video. When this bulb burns out, the screen dims to almost black. Failing backlights can also cause the picture to flicker, blink on and off or offer an odd color cast to the screen.

If your LCD backlight is not working consider the possibility of the LCD not lighting up because of the blown fuse on your laptop's motherboard. Imagine the following: You have an LCD that does not produce the backlight. You order and install the LCD with the new one, however, the backlight is still not functional.
+91-97171 50098