A couple of months ago the voltage regulator on my motherboard exploded on caught fire -not all of them only three- so I asked if it could be fixed and it was and currently it's working fine but sometimes it doesn't start the BIOS, just a black screen and apparently the guy who fixed it removed the burnt regulators and created a short circuit, so my question is can it cause problems to my hard drive.
Agreed. It is possible. No good comes when a capacitor dies. If you can handle a soldering iron proficiently, it could be worth your while to switch that puppy out. Otherwise, use your warranty if it's still good, or replace the motherboard.