Screen not staying on

All of a sudden yesterday, my otherwise perfect 2008 30" Cinema display went dark. When I hit the power button on the side I can get it to engage but it's very dark and only stays on for a couple seconds with the button held. Is this a repairable problem or is it time to say bye-bye?

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Just discovered that my headphone jack is also not working, not sure if its related but it was working yesterday and there were no changes.

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