5 beeps on a Dell Inspiron 5110

Hi,

I have an issue with my laptop.. it beeps 5 time(loud) when I turn it on then when it loads the Windows it goes really quiet but still beeping.

I know that 5 beeps usually means changing the CMOS battery.. I did that but still beeping.

P.s i ran the diags, everything work fine with not a single error.. the windows boots properly (I can even keep working on it) and I have no problem regarding the drivers or other components..