Windows 7 rc runs perfect on this laptop. However I have one strange issue; sometimes when I start the laptop and when it gets to the log in screen the screen goes very dark, other times it is fine. At the right angle I can still see the login screen but again like I said it is extremely dark. Now to fix this, I either close the laptop to make it enter sleep mode, or hit the power button to make it enter sleep mode. When I reopen or hit the power button to take it out of sleep mode, the screen is now fine. This only occurs at the login screen during startup. All images beforehand like the bios and windows 7 loading icon appear correctly. Any idea's as to what is causing this strange issue? It's weird since it does not 100% happen, only sometimes. Thanks in advance.