Reinstalling the driver for your graphics card may help.
Rik from RCE
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That sheds a whole different light on the matter. It is most likely to be the connector to the screen has come loose then. If you have a monitor to hand, boot it up with it plugged in and see if the colours are correct on that.
If they are correct then it must be the connector. It there is no difference then it means your graphics card has had it.
Rik from RCE
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You will need to almost completely dismantle the laptop to get at it and that is a big job indeed.
Rik from RCE
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Well, if it is somehow the connector, it would be a solder job. Definately not for beginners.
Can you send it off for repair? How old is it?
jbennet
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I dont think it is that though. Cant see how a faulty connector could do that.
In my opinion, the card (and therefore the motherboard) is just broken in some way (possibly due to overheating, a common issue in laptops).
jbennet
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The original poster says it works fine through an external monitor which shows that the built in graphics card is working fine.
I do not know off hand where the connector is located as I have not dismantled a laptop of that make, I have only dismantled Dell's and a few Compaq's.
Just follow all cables / connectors that go between chassis and screen and go from there.
Rik from RCE
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It most likely means the screen itself is faulty and needs to be replaced.
Rik from RCE
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