Why won't my computer go to sleep?

Question

Windows

Windows7 SP1 Professional.
The power plan is set to sleep after 2 hours, but it doesn't.
Only the monitor turns off and the PC continues to work.
Tried to make a powercfg -requests request. Returns:
DISPLAY:
None.
SYSTEM:
[DRIVER] Realtek High Definition Audio (HDAUDIO\FUNC_01&VEN_10EC&DEV_0887&SUBSYS
_1458A002&REV_1003\4&395a8c5b&0&0201)
Audio stream is already in use.
[DRIVER] \FileSystem\srvnet
An active remote client has recently sent requests to this computer.
AWAYMODE:
No.
If I understand correctly, then the sound card interferes with the transition to sleep mode.
How do I turn off her wake requests?
Is there any other way to diagnose this problem?
EventLog looked - there are no messages about errors with power supply or hibernation.

Answer 1

Look in the BIOS settings to see which devices are allowed to wake up.