My LC stopped powering up a while ago due to the clicking PSU. I was in a hurry to test some things and was a bit annoyed 'cuz I didn't have another LC to use.

So, I ripped open the PSU to see what I could see. Lo, and behold: the caps in the PSU had leaked goo all over inside it. I gave it the kitchen-sink treatment and my LC is working fine again. Someday I'll have to recap the PSU but I bet that won't be for a few years at least.