Alienware Aurora sudden Beep/Boot issue.

Hey

I was turning on my Aurora earlier today and suddenly the Monitor was left black and even though the Desktop was working all I could hear was like 3 beeps repeatedly coming from near the power supply.

I tried turning it on after like 2 or 3 times and at the 3rd time the PC turned on at last.

I am very scared something happened to my computer thoug, since I haven't done anything to make this happen.

I just want to enjoy a peacefull weekend and have no problems so tell me what should I do now?