One of few colors are missing on the laptop screen

Problem description:

The laptop screen works normal but one or few colors are missing. All colors are displayed properly on an external monitor connected to the laptop. The colors are missing only on the laptop screen.

Possible cause:

1. Poor connection between the video cable and LCD screen or motherboard/video card.

2. Defective video cable.

Possible troubleshooting steps and repair solution:

1. Try reseating connection between the video cable and LCD screen. Unplug the video cable from the LCD screen and plug it back in. Make sure the video cable connector plugged all the way into the connector on the screen. Check connection between the video cable and motherboard/video card.

2. If reconnecting the cable doesn’t help, try replacing the video cable with a new one. Apparently, the video cable is defective and has to be replaced.

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