Hi,
Does it continue beeping even when windows has fully loaded? Here are some troubleshooting steps that may help in solving the issue.
- First do a hard reboot, remove the battery and AC adapter then press and hold the power button for 20 seconds then try booting it up. If the same problem persist proceed to the next step.
- Next is to reseat all the RAM's, remove them all for couple of seconds then put them back in making sure all RAM are seated properly into each slot.
- Also do disconnect other devices connected to your laptop. (USB driver, printer etc..)
- If all these will not work do run a complete factory reset.