Hi grumpyeyore,

I’d suggest that you follow the steps mentioned below and check if the beep pattern repeats.

1. Switch off the computer.
2. Disconnect the AC adapter from the system.
3. Remove the battery from the computer.
4. Press and hold down the power button for 15 seconds.
5. Then connect back all the peripherals and check if the beep pattern repeats.

Hi grumpyeyore,

It seems like the some key on the keyboard maybe pressed. Please check if there is any particular key pressed.

Also, please check if the keyboard works in the operating system.

Can anyone please tell me how I can shut this irritating noise off

Some of the models have a setting in BIOS for keyboard beeps. Here is a way to disable beeps in general in Windows.

1. Open “Control Panel\System\Hardware Tab\Device Manager”.
2. At the top click “View\Show hidden devices”.
3. Go to “Non-Plug and Play Drivers” and  double click “Beep”.
4. Click the “Driver Tab” and change “Startup Type” to “Disabled”.
5. Restart.