Check this one out. If 4 beeps then ram issues.
My laptop is also making beep sounds. 5 beeps then break then again 5 beeps. Internet research suggests its the cmos battery running out which is believable since the laptop is 5 years old. Ill be replacing it this saturday/sunday (cmos cell is just 30-60rs). If you also have 5 beeps then reply to this and i will give u an update on my issue after changing cmos cell.