See this at: laptoprepairguy.com| Added on 04/10/07

Do you have a problem with the backlight on your laptop? If yes, you are not alone, that’s one of the most common laptop problems. In most cases the screen inverter is the culprit. Here are some LCD screen backlight failure symptoms that could be... See more

Do you have a problem with the backlight on your laptop? If yes, you are not alone, that’s one of the most common laptop problems. In most cases the screen inverter is the culprit. Here are some LCD screen backlight failure symptoms that could be related to a bad inverter board: - Laptop boots as usual but after some time the screen blacks out. You still can see an image on the screen but it’s very dim. You might even use a flashlight to see it better. Sometimes the backlight comes back for a while but then goes off again. In some cases you can turn the backlight on if you tap rapidly on the lid close switch. - The screen always stay black and the backlight never comes on but you still can make out an image on the LCD. It’s dark, but the image is still there. -In some cases you might hear a buzzing noise coming from the area where the inverter board is located, it’s on the bottom part of the display assembly. NOTE: if you cannot see an image on the screen, most likely you have a... See less