Someone page me

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I have a Ceronix 15" LCD in my PEII+, but the LCD should show something even if it's "No Signal Input". There should be a menu button on it, if you press it does a menu appear on the screen? If not, I'd look at replacing the inverter board, I've had a few of those go bad in Kortek LCD monitors. Next would be the A/D board, and lastly the CCFL tubes. I'm assuming your customer bought this LCD used from somewhere basically as is?
Some pictures would be helpful, but wiring wise that sounds about right, red, green, & blue colors, Horz & Vert sync, and ground is all that is needed.