IBook has no backlight even after LCD Panel and Inverter Board Replacement,

I just got hold of an iBook G3 800mhz that works excellently aside from the fact that it has no backlight. Usually, I can figure this stuff out pretty well, and I had some parts around, so I replaced the inverter board and LCD panel. Still no backlight. I reset the PMU and NVRAM, and of course turned up the brightness in System Preferences. I can't figure this out. What else could it be?

Hi Guy,
As Rhonda suggests it's probably the inverter cable. I've repaired two recently both were broken at the hinge point where the cable is wrapped in this silver flex tape. One was the red wire, the other I forget. I diagnosed this by pushing the wires together at the hinge. Once I found the broken one and isolated the point that it was broken I soldered it together and used shrink tube to repair it.
Richard

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