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Power lights turn on but the screen shows no image


Problem description:

When you push on the power button, the power light on the laptop turns on but the screen shows no image. The laptop screen remains black and blank. Video on the external monitor also not working even though it used to work fine before.

Possible cause:

1. Memory failure.
2. Video card failure.
3. Motherboard failure.

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Image on laptop screen freezes and slowly turns white


Problem description:

Spontaneously the laptop screen will “freeze” the current image and then slowly turn white with some faint gray blotches. If I move the top of the laptop toward me, sometimes the image comes back to normal. If I move it backward, then the image freezes and goes white again. The laptop works fine with the external monitor.

Possible cause:

1. Bad connection between video cable and LCD screen.
2. LCD screen failure.

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Half the laptop screen is black


Problem description:

One half of the laptop screen is completely black. The second half of the screen works properly.

Possible cause:

LCD screen failure.

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Laptop screen goes darker when adapter plugged in


Problem description:

The laptop screen goes darker when the power adapter is plugged in. When the adapter is unplugged, the screen becomes brighter.

Possible cause:

Wrong setting in the power management software or BIOS.

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Lower part of screen displays garbled colors


Problem description:

The lower part of laptop screen displays garbled colors and the upper part of the screen works just fine.

Possible cause:

LCD screen failure.

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Laptop screen shows vertical dotted lines


Problem description:

The laptop screen shows vertical dotted lines. The dots are red and moving up and down. The external monitor connected to the laptop either has garbled image or shows same dotted lines.

Possible cause:

1. Failed memory.
2. Failed video card.

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Laptop has a few colorful lines on screen


Problem description:

The laptop has a few very thin colorful lines on the screen running from top to bottom. These lines are vertical and spread with irregular intervals. Lines appear on the screen even on the BIOS level.

Possible cause:

LCD screen failure.

Tags:

Laptop screen flickers on and off


Problem description:

The laptop screen flickers on and off.

Possible cause:

1. Screen inverter failure.
2. Backlight lamp failure.
3. Bad video cable.
4. Video card failure.

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Horizontal flashing lines running across the image on laptop screen


Problem description:

There are horizontal flashing lines running across the laptop screen. The laptop starts fine and you still can see the picture, but there are flashing lines running across a part of the image.

Possible cause:

1. Video card failure.
2. Bad connection between video cable and LCD screen.
3. Bad LCD screen.
4. Faulty video cable.

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Laptop backlight stopped working


Problem description:

The laptop backlight stopped working without any reason. The screen was working fine a while ago but now it’s very dark. The image is still on the screen but it’s barely visible. When the laptop rebooted, the screen remains very dark.

Possible cause:

1. Backlight inverter failure.
2. Backlight lamp failure.

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