Strange sounds coming from computer in sleep mode

[nw66]

Envy all in one

Stange beeping sounds come from pc in sleep mode

[GamingOptional]

Run the Power Troubleshooter.

Click the Start button then the Settings(gear) icon, then Update & Security and then click Troubleshoot.

Then click Find and Fix other Problems, then click Power.

Run the Troubleshooter and allow it to detect and fix any problems.

Then restart the PC and see if your beeping is gone.

[nw66]

No this doesn't solve the problem and I'd already done it.   Its like the computer is trying to tell me through gentle bleeps that are quite musical that its still on in sleep mode.  Its a real annoyance as I leave the computer for a while and the strange beeping will start.  I'm having to turn off the sound to stop it from be constantly annoying.  Worse is that there is no associated visual warning to explain why it is beeping!