Hard Drive PCB problem

I need help regarding my HDD. its a samsung 500gb SATA internal hard drive. yesterday, as usual connected it with a SATA to usb cable and gave it power from the sata power cable connected to the 220V AC source(using an adaptor). i have been doing this for 6 months without a prob. but today, i smelled some burning plastic and saw that in my computer that my hard drive was not functioning. then i saw that a small capacitor/resistor like thingy in the hard drive at the back was burnt black. i tried to power it on several times but i failed the hard drive was not powering on. there was no sound or vibration. so now can i do anything to fix it? will my data be lost ? any help will be highly appreciated. anyway.. i tried using in many other computers but it didnt power up... i saw stuff on google about being able to replace the pcb board... if that is possible i would prefer doing that.. otherwise i'll have to ship it to usa from kuwait using dhl.. that will cost a lot.. i am in two minds.. should i place an rma or just simply have the pcb board changed.. i need help on that!!