Standby not working

[Volodymyra]

Hello, I had an HP Compaq 6735s notebook purchased, had first Windows Vista Ultimate 32-bit installed and already have a problem.
The system is no longer than 3 minutes in standby mode.
he Hardware always supervised by himself. Until yesterday left everything yet wonderfully, I have nothing but the system changed.

There is no way to determine what application / event the system from standby mode picks?

[Leonard23]

At times in the BIOS after Wake on LAN or Wake on PS2 look!

[Volodymyra]

Wake on LAN is turned off and Wake-on-PS2, I have found the setting.