Black Screen - Backlights work

Dear all,
I was working on my MacBook pro this afternoon when *the screen of my MBP suddently turned to black*. However, the *backlight still works* and I'm able to modify the brightness of the screen. Moreover, *my second monitor is still working* and I'm able to write this line thanks to it.
At the opposit of the other threads, *I didn't put my mbp in sleep mode before it happened*.
I've already tried several manipulations such as _Resetting the SMC_ and _the PRAM_.
My Laptop is a *MacBook Pro 3,1*, late 2008
Thanks,
Antony

In win7 there is a shortcut to alter the display (WINKEY+P). Try use this. If not work, maybe a problem with the cable of the notebook display.

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Hey enderci,
Thanks for using Apple Support Communities.
If you are not getting video, this articl has as section for no video that should help.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573#1
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Message was edited by: Lindberg

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1. Start computer (chime sound)
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3. Spinning wheel below Logo appears
4. Screen flicker, big vertical zigzag appears, black screen (backlight is on)
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7. no responses with any other keys on keyboard
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1. Reset PRAM & NVRAM & PMU
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Markus:
Run Hardware test over DVD - Diagnostics all fine (Screen fine all the time, running through all diagnostics)
Your issues seems rather strange. From the statement quoted above, am I to understand that when you boot from the Apple Hardware Test disk you are able to see the tests running on the monitor, but when you attempt booting from the install disk you cannot see anything on the monitor? If that is so, it seems rather odd that you can boot from one and not from the other.
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