Led cinema 27 black screen

Hi, my led cinema 27 has suddenly lost its picture, and now I have a permanent black screen. Speakers work well, I can listen to a DVD...
Could be a hardware problem?
Many thanks.
OSX 10.7.4, mac mini 2,26 GHz Intel Core 2 Duo.

Speakers are on the usb connection so that has nothing to do with the display.
It could be hardware -- display itself or the video card.
Do you have another computer you could test the display on?  That would verify whether it's a display problem.
Fo you have another monitor you could test your computer on?  That would veify whether it's a video card paroblem.
Do you have an apple store nearby?  You could take you mini there to do that test.  Even if you are not under applecare I would think they would let you plug in one of their monitors to check your machine out.

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