Screen is dark after hibernation

I recently used bootcamp to load Windows 7 on my Macbook. Lately, I have noticed that when my Mac is taken out of hibernation or sleep while in the Windows partition, the screen is almost completely black. You can still barely see the Windows desktop, but not enough to work in. The only solution I have been able to find is to restart te computer. Any ideas?

Even when tried to redeem voucher and item in download keep getting same message"Please review account details, Store request, as internet connection timed out, Make sure network settings are correct and active but it always seems to freeze when I try to do something!!So consequently after 5 weeks and an extra $50 for voucher just to get SOMETHING on ipod still nothing except a couple of podcasts that only play half before ending. Does Apple have a Tech Support Phone Number in Australia? If they cant assist I will be getting rid of it as its been nothing but a great big time and money waster!! Disappointed and frustrated to the MAX,
Julianu

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