Dell LS400 LCD Problem

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Dell LS400 LCD Problem

I have a problem with Dell latitude LS400 LCD. Initially the cable was damaged internally due to crack at the hinge joint as a result of loose hinge bolts and the screen turned white. I have replaced with another cable which seems to be okay (claimed by the seller) and I can see menu and desktop but the colors are blur but bright as before, I mean the there is no color rendering and the black areas appear to be purple. There are some fluctuating lines on the screen as well. In short the color smoothness is gone while text font is still crisp clear. When an external CRT monitor is connected the images are crystal clear. Is that still the cable or the inverter or something else?

What I suspect is the faulty inverter. By the way inverter steps-up DC to how much voltage and what kind of HV output signal is fed to LCD?

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