@sarahi85782 this beep might actually be a troubleshooting diagnostic beep. Tell us more about the beeping. Things like how long, how often and when does it beep etc. is important to see You can also add a small video to your Question so that we can see what you see.
Of course, it is also possible that the beeping comes from the fan or even the hard drive etc. That is way we need you to be as descriptive as possible.
Here are some of the possibilities about the Beep codes
***1 short beep***: Refresh failure
***2 short beeps***: Parity error, or a damaged RTC/BIOS battery CMOS
***3 beeps***: Memory error
***4 short beeps***: System timer failure, or the motherboard's timer isn't working properly
***8 short beeps***: Display memory failure, or a problem with the graphics card