The best Klipsch computer speakers, the 5.1's, have a reputation for blowing the power supply, which I found out reading after mine blew.
		
		
	 
A power supply is fine.  Even a sufficiently motivated geek with not a lot of prior knowledge can research, buy, and install a replacement.  The dock, however, was never really nailed down.  People on the Klipsch board, regular members since the company itself did nothing for us, think it's an issue in the dock that fries a logic chip that's actually on the control board in the sub housing.  Presumably, this requires programming, so it's not just a pop and replace.
It's literally the one thing in the entire speaker set that I cannot replace myself.  I'd be fine doing any of the dock components, certainly anything in the speaker housing, crossovers, analog controls, etc.  Good thing they used some kind of digital logic to have the dock interface with the main control board.  You know, because volume, sub level, mute, and ipod low level input really require it.
The worst part is, people who did get replacement docks while Klipsch still had them reported failures down the road on the new dock.  So they never fixed the issue, continued to sell what are probably defective parts, and now provide no support for a "premium brand name" product.
Lesson learned.  Klipsch is no longer a premium brand.  Premium brands provide support and fix defective products.