Thank you for your reply! Good to know. I actually have a few other PowerBooks I could use for a spare CCFL, but an LED backlight is very tempting, and would last longer. 

Apart from the backlight being very dim, the display still works fine, so I haven't thought of replacing any caps yet. I had the impression there are more of these on the passive-matrix displays and thus more of an issue on those. I'm more worried about the tunnelling problem (although the display doesn't show any signs of it yet) and was thinking if I could do anything to prevent that.

Macdrone said:

I won't try and derail you plan, but ccfl' are still readily available and easy to replace in these.

Just a suggestion as you will most likely want to recap the screen while your in there.

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