Told to take computer to an authorized service provider

I phoned apple about the clicking noise my computer is making, and they told me to take it to the nearest authorized service provider for evaluation.

Before I take it there, I want to know if what i have is worth worrying about.
When all applications are closed, and airport and bluetooth are turned off, and all peripherals are disconnected, my computer sounds like a clock. Every second it makes a clicking noise. Worth checking into?

Its not that it annoys me. Its that i'm worried the hard disk has a problem, and it will fail after the one year warranty.


I ran a hardware test, and did the disk first aid verify permissions and repair permissions, and i did the verify disk....like the tech instructed me to.

I guess i'll just take it in...but the store close to me won't be very happy that i didn't buy my pb there.