Hunter's post basically covers it.
But it's more financially just to simply replace a part completely than to try and fix it. It will cost more to ship, disasseble, fix, reassemble and ship the product back than it would actually cost to just build a new one from scratch and ship as part of a large shipment.
The only thing I've ever found might be worth repairing is the power supply, if a capacitor or choke has gone. This is cheap to fix (parts will cost you like $5 max) and soldering is easy on the relatively simple PCB.