The inverter board is an essential component of a laptop, providing high-voltage power to the fluorescent lamps that illuminate the screen. When the inverter board is faulty, the LCD panel will lose its backlight, resulting in a black screen with a faint image still visible. This blog post will provide a step-by-step guide on how to diagnose and repair a faulty laptop inverter board. The first step is to eliminate other possibilities by testing the monitor on several computers.
Make sure that the monitor's indicator light stays on and on. The only reliable way to test the inverter is to replace it with another one and see if the screen lights up after that. To replace the inverter board, you'll need to remove the bezel from the screen, remove the hinge cover, and then remove all the screws around the screen frame. Once you've done this, you can fold the screen back and access the inverter.
If you've replaced the inverter board but are still experiencing problems with your laptop's backlight, it's likely that the issue lies with either the screen itself or the inverter cable. To test this, try connecting your laptop to an external monitor and see if it works properly. If it does, then you know that the problem is with either your laptop's screen or its inverter cable.If you're experiencing a black screen with faded images every time you turn on your laptop, try testing the inverter input. If you get 1.85 V at first and then it goes down to 0.48 V after a few seconds, then it's likely that your laptop's inverter board needs to be replaced or repaired.If your HP Compaq nx9010 laptop has a black screen but still works when connected to an external monitor, then it's likely that the problem lies with either your laptop's LCD screen or its video card.
If it does, then you know that the problem is with either your laptop's LCD screen or its video card.Finally, if your Compaq Presarion cq 40 TU laptop gets very hot and then its screen darkens forever, try replacing the inverter and connecting the screen to another laptop to check its backlight. If this works properly, then you know that your laptop's inverter board needs to be replaced or repaired.