Problem with sleep mode on ASUS motherboard

[Logan.M]

I have ASUS P4P800E Deluxe motherboard. I have problem with the sleep mode option with this board on my computer. I have latest bios installed. Whenever I select sleep, the screen goes off but I can see the power button ON and the fans still working. Am I missing something? Do anyone have any solutions?

[switchblade327]

Try to do a system restore to a point before this started.

[Lemog]

Update all of your drivers including your graphics card, sound card (if any). Also check your Event Viewer log for any errors.

[Nihir]

Change the BIOS settings to use aggressive S1 power state instead of S3, so that more devices are disabled and maximum power is conserved.