LCD Display Inverter Test?

[Flynmac]

Is there a way to test the inverter before moving on to the next possible reason for very dim iBook LCD?
Since an external display is rock solid at any lid angle, I don't think it would be the cable but would like to be able to test the inverter.
Whats involved?
Thanks

[Insulin Junkie]

This'll help you.
http://www.fonerbooks.com/test.htm