Dark Display on HP Compaq NC6400 – Fixed

After ruling out a motherboard fault by hooking it up to an external monitor via the VGA cable we assumed the screen itself was what was faulty here, but after trying a couple of other screens and getting the same results we tried a new inverter.

Same result.

Only thing left was the main screen cable that connects into the motherboard and left side of inverter, but getting to it involved a bit more work.

Off came the keyboard and the power button bezel and hey presto problem solved; the cable was not properly plugged in tightly on the motherboard end.  As soon as it was reseated the display worked perfectly.

Simple fix, eventually.

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