10 minutes of work? You never have had trouble trying to unplug a power plug out of a device drive? Damn those things can be hard to unplug sometimes...
I'll manage though...
2 weeks might be an overestimate. When I return it now, I would just tell them what to do, and they don't have to bother with running all the diagnose cycles. But if it's easy enough (time spent on it doesn't matter to me much, but the risk I take does) I will do it myself.
But in any case you recommend to replace the entire power supply, instead of the fan only, just to be sure? (also because it's easier and safer)
And are there certain power supplies you would recommend, or should I just buy a standard unit with has at least the same Power? (I have no major upgrades planned.)