Recently i was trying to install linux on my spare hard drive and i noticed for the first time that everytime the dvd/cd tray goes back into the cd/dvd drive, the computer makes 2 quick beeps. They were pretty load at first but i tried ejecting the dvd tray a couple times and now when i insert the dvd and close the dvd tray, the beeps are still there but are very faint. They are definitely coming from the computer itself, not the speakers, and i don't think i noticed them before. Any ideas why this is happening?