Simple Laptop Screen Replacement, Not So Simple?

[i2omani]

Do you have a spare LCD to test with and see if it is the the GPU?

CCFL are easy to change if that is the case. i can hardly remember seeing a broken CCFL 99% it was a burnt sign that caused it to disconnect from the cathode.

 

[KompuKare]

I assumed from this ( though he never clarified it) that somewhere between the pinouts on the GPU for the internal LCD and the connector socket for the cable was faulty, though it may have just been the GPU partly faulty , not too sure. But anyhow, hope that sheds light on some questions here.

Hm, not sure how the GPU pinout is handled but isn't even more likely that (in the same way that a CPU uses around 10-30% of the pins for power) the GPU has multiple pinout paths for internal and external display paths and the 'bumbgate' has only damaged one of those? Or was that what you meant?

Since most people never use an external monitor with their laptop, I imagine there are an equal number of laptops out there where the internal still works but the external is gone. Or more pertinently, where the external is totally gone, but the internal is at the random lines on display stage.