While it shouldn't, third party CHEEP parts are not a good idea. Again, it should have burned the entire machine but I have your word that it fried the HDD.
I bought an HP G60-235dx with Vista 2 years ago. Last month the power cord went and I bought an aftermarket one off ebay for $9 (HP wanted $56). 2 weeks later the computer will go to a blue screen when I start it after the HP logo comes up and Windows attempts to start. Windows won't open in safe mode, system restore/recovery wont take, etc. I ran the self test and it came back with error code 10008-replace hard drive. Could the aftermarket powercord have fried the hard drive or is it just a coincidence? It only happened once or twice, but I do recall a notification pop up that the cord was actually less powerful than the original and charging wouldn't be as efficient.
I assume I need to at least run a recovery disc and if that doesn't work, replace the HDD and run the disc again. If I spend the money to get those, I don't want the cord burning up another hard drive.