22 in. Cinema Display Failure

Dear all,
I have a problem with my 22in. display. I was using it and suddenly the image disappeared.
It have tried many things... the only symptom that it gives is that when the computer is off the orange light on the power button in the display lights up, when I start up the computer this orange light turns off and the display never lights up.
Please... help me guys... Apple Tech Support... someone!!!
Thanks a lot in advance.
Eloy
codename: Mercury Mac OS X (10.2.x)

22" ?
Not 20" or 23"?
Anyway, it may be the backlight inverter.
Try lcdparts.com for help.
It worked for me.
P.S. You're still on OS 10.2.x? Time to get the update

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