Hi mt,

Could you please share the exact system model no. of the computer. Inspiron 15 is available in different variants. Also, share the number of beeps you hear from the computer. Please check for any stuck keys on the keyboard.

When exactly do you hear the beeps?

I would also suggest you to run the Dell Diagnostics to check the hardware functionality. Power off the computer -> restart the computer, press 'F12' key on the Dell logo -> Select 'Diagnostics' from the boot menu.

Thanks and Regards,
Appu S