The beeping is a Pre Operating System Test (POST) code, if the beeps are 6 in total then that is generally indicative of a failed video device, if you are getting multiple fast beeps then usually this is your RAM.


If its 6 beeps then check the card is correctly seated - pushed in!

If multiple beeps then try using 1 stick of RAM at a time.

IF you get the machine working then enter the BIOS and return the settings to defaults and reboot - IF the machine will not boot to BIOS then you will need to look for the reset jumper on the motherboard

If neither of these work then repost and I will have another think!

chin up!