Model A1286. Released February 2011 / 2.0, 2.2, or 2.3 GHz Quad-core Intel Core i7 Processor

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white screen on start up with no response from keybaord

My laptop suddenly goes white when i switch it on and no apple sign shows the screen completely goes white with no response from the keyboard when i try to reboot with keys. What could be the problem ?

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There are several possibilities... without more history or background it's hard to limit them. (Explore the tags at right)

You should attempt to connect to an external monitor (if you see nothing, or, if you see a normal desktop it can help offer possible solutions). The same with connecting an external USB keyboard - it need not be an Apple one (at the same time you connect to an external monitor) this too can point to possible causes/solutions.

The more information we have the more help we can be.

If this Answer is helpful please remember to return and mark it Accepted.

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laurence will be eternally grateful.
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