Beep Sound At Booting

My laptop was working fine. I traveled in a long distance flight, and since then, I am having this issue.

At boot, I hear 5 beeps, a pause, then 5 beeps, a pause and repeated. I checked the majorGeeks forum for Dell laptop, suggested CMOS issue.

I tried the following:
1. Logged into BIOS setup, changed the time to the local time. didnt work. Tried "load defaults" - also didnt work
2. Ran PSA diagnostics - no error

Current situation:
1. Even after re-boot, the time I set in BIOS is showing correctly - does this mean the CMOS battery is working fine?
2. After boot-up, when I hear the beep sound, I press mute button and the beep stops for few seconds, and then again starts.
3. The laptop is otherwise working fine, no issues other than the annoying beep sound.

Kindly advise. Attaching the details from Belarc advisor below:

Operating Sytem
==============
Windows 7 Ultimate Service Pack 1 (build 7601.24385)
Install Language: English (United States)
System Locale: English (United States)
Installed: 10/31/2016 9:53:34 PM
Boot Mode: Legacy BIOS in UEFI (Secure Boot not supported)

System Model
============
Dell Inc. Vostro 3558 01
Chassis Serial Number: 5P4PMC2
Enclosure Type: Laptop

Processor a
===========
2.00 gigahertz Intel Core i3-5005U
64 kilobyte primary memory cache
256 kilobyte secondary memory cache
3072 kilobyte tertiary memory cache
64-bit ready
Multi-core (2 total)
Hyper-threaded (4 total)

Main Circuit Board b
====================
Board: Dell Inc. 0PPH4M A00
Serial Number: /5P4PMC2/CN1296368J0EA9/
Bus Clock: 100 megahertz
UEFI: Dell Inc. A08 07/01/2016


Thank you!
Ramya

 

Look over here.
https://kb.iu.edu/d/afzy

 

Hi Eldon,

I had already checked the link.. it did not mention about Dell laptops.. i did check on dell laptop beep codes, which listed cmos battery issue. But i am not facing any battery issue either, the laptop does remember the timings. Please suggest

 

Took the CMOS battery out, and put it back in. For now the beeping has stopped.. Will keep monitoring,

thank you!

 

If it happens again, check if replacing the CMOS battery resolves the issue.

 

Sure will do! thanks..