[sdiy] Bizarre LCD Display Behavior & Is backlight AC or DCVoltage

[Paul Schreiber]

This is more than likely a CCFL backlight.

http://en.wikipedia.org/wiki/Cold_cathode

These use a fairly high *AC* voltage, generated by a circuit called a Royer 
Inverter:

http://en.wikipedia.org/wiki/Cold_cathode

and in general:

http://en.wikipedia.org/wiki/CCFL_inverter

The inverter is usually a separate pv board, not part of the LCD matrix 
circuit. Therre are several companies that sell either replacement 
boards/tubes or they have white LED replacements

http://www.ccfldirect.com/

Google is your friend :)

Paul S.