This I can tell you directly, the power supply capacitors can be replaced, electronic parts are independently welded to the PCB board, that is, can be removed and replaced, if it is obvious that the capacitor is out of the problem, and can buy this capacitor (very cheap) that of course, is to change the capacitor, if you can also do it myself I can clearly tell you the cost will not be more than five dollars if you re-buy a power supply a minimum of 200 yuan or more, you weigh yourself! The first thing you need to do is to get your hands on a new power supply, which will cost you more than five dollars.
If you want to change the capacitor is to remove the bad capacitor and take it to the electronic parts market to buy back according to the solder up to try, in fact, very simple to deal with.