I've noticed the same thing - although I've had mine for 4 or 5 years now.
It's kind of annoying that they put paint on all the components inside. I work as an electronics technician so I'm trying to figure this out. So far I noticed that the fuse on the power supply board opened. So I went to Microcenter, bought a new one, and replaced it but it popped as well. So there must be another problem but, like you, nothing inside looks burnt. I found a set of schematics for the 2.1, but it seems to be an older revision (it had a fuse on the outside, a power switch, a different power supply, and different parts inside).
I'll let you know what I find.
Oh, and the fuse is labeled "F1" and it's right next to the connector for the AC power. The specifications for it "T2A/L250V" are next to it as well. It's not a cartridge type fuse, they made it a through-hole component that is soldered onto the board.