how to replace a powerbook screen

Hi all....
My brother has a powerbook G4 15" and the screen cracked and needs to be replaced...
I have a lot of experience in taking apart x86 PCs and laptops. I never touched a Mac before.

I took the task and started removing the screwes, and was able to remove the top part that contains the keyboard....
now after that, it seems so hard to get the screen out with all those cables connecting it to the board....
are there any instructions to tell me what do i need to remove first...
some kind of step by step guid to replace the screen?

I appreciate any help
thanks
.

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