my mom bought me a pavilion elite m9350f pc as a gift for my bday. the moment i unpacked the box and plugged to the outlet, the back of the cpu sparked with loud bang and smoke. i thought the voltage was universal that i can plug it to 220v but i didn't know i have to switch it at the back of the cpu, turns out that the local settings was in 110 volts. i looked inside the cpu and peeked in the power supply unit, i see melted wire skin and burned copper. i don't see any physical damage to other components. my questions: is it frequent to other people when their psu explodes other components will get broken? or let's say that the new psu worked and the whole cpu works, will problems starts to come out after long term use?