Toshiba Tecra cdt 550 LCD is DARK. HELP

[amexjoe]

I am working on a Toshiba with a dark LCD. Several users pointed to the FL inverter as the most likely problem. So I replaced it. LCD is still dark. There is no voltage at any time at the contacts going to the lamp. I am monitoring the voltage from the time I power up the unit and continue to monitor while switching from the LCD to an external monitor.
I am thinking that there is no voltage going to the FL inverter from the mobo.
So, I need a little help probing the contacts that come from the mobo to the FL inverter. Any and all suggestions greatly appriciated.

[Damned Angel]

does it work displaying to a desktop monitor?

[amexjoe]

works fine to a monitor and I can see the image in the lcd panel but the lamp does not lite.
there is no power on any pins @cn1 connector when on the battery pack.
there is power on pins 5 and 7 when the ac adapter is plugged into the notebook. (5.04vdc)
does anyone know what voltage should be present @cn1?