Hi Insporonist,

Thank you for writing to Dell Community Forum.

Disconnect AC adapter & Notebook Battery and then remove the CMOS, start the laptop once only with the adapter and check if the beeps are observed.

Please update the BIOS to the latest version available on Dell Support site.

Please private message us the service tag of the system.

Kindest Regards,

DELL-Akshatha M

Social Media and Community Professional

#IWork4Dell

i have the same issue with my dell 3541 with windows 10, every time i start it up it beeps 5 times and some times it beeps 5 times when i shut it down. how can i turn this sound off my commuter runs perfect please help. 

Hi Dunn429,

Thank you for writing to Dell Community Forum.

Please advise the result of the steps mentioned in the above post.

Also, please private message us the service tag of the system in discussion.

Kindest Regards,
DELL-Akshatha M
Social Media and Community Professional
#IWork4Dell

My Dell is an Inspiron 11 3147 and same thing. It is a year old and just started beeping in a series of five times for two times and then beep twice. I did as suggested above and even did a system restore. It is still beeping. I do not nkow how to private message you or would andgive you the Service Tag.

Hello, was it fixed for you? My dell continue to beep even after Costco replaced the CMO battery?

i was told by computer repair man its battery for internal clock?