LCD inverter?

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spiker_22

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Jan 26, 2003
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133
Recently my Inspiron 8600 started booting with a black screen. Shining a flash light on it, I could see login prompt then XP desk top. This kind of thing usually points to the Inverter; however, both the CCT (Cold Cathode Tube) and wiring could also be the source of my problem. I have dismanteled the display down to removing the bezel and freeing up the LCD panel. Where do i go from here to be sure which component is the cause f my problem?

Thanks in advance
 
Joined
Aug 17, 2003
Messages
17,584
To be honest, the best way is by substitution of the inverter or the backlight. Whichever fixes it is the problem.

The high voltage produced by the inverter could be measured with an appropriate meter, but as it is effectively a ballast the results could be affected by the CCT backlight, it may be hard to deduce just which is the problem. Open circuit voltage would also be inconclusive, it could still be a defective inverter that falls over with the load and fails to strike the CCT.
 

JohnWill

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Oct 19, 2002
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106,429
FWIW, the inverter and backlight tube are generally not that expensive. The easiest way may be to just buy both components.
 
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