I am afraid that the T3 transformer is actually melting, here are the pics:
I don't need circuitry knowledge to see that it really shouldn't be in this shape, also the bottom terminals in the first picture seem awfully fried/burned.
I recently bought a PowerBook 550c. After seeing them pop up for sale from time to time on eBay I decided I really wanted to buy one of them. I had a PB 540c for many years, and it was a great machine. I now regret selling my 540c, and even worse I sold the Rev C PCMCIA card cage. Now I want to find one for this 550c and I can't find one anywhere. Any ideas?