For about three weeks my PC has been turning on by itself, most of the times during the night (while I'm sleeping) and close to noon or on the afternoon. A few times it turns on by itself a little while after I turn it off (Shutdown option in Windows).
I see no regular pattern, since the Windows Event Viewer records show the times for system boot up and shutdown. The PC tuns itself on at different times, also there's no regular time gap between the last shutdown and system boot up.
Here's my PC configuration:
- Intel DH67CL motherboard (B3 stepping),
- Intel i7 2600 processor,
- 8 GB Kingston RAM (2 x 4 GB),
- 1 x Intel X-25 40 GB SSD in SATA2 (boot drive),
- 2 x Seagate 1 TB HDD in SATA0 and 1 (mirror RAID),
- 1 x internal LG DVD-RW in SATA3,
- 1 x internal card reader (in USB internal port),
- MS keyboard,
- Logitech mouse,
- Seventeam Power Supply Unit,
- Cooler Master case,
- APC Back UPS no break unit model BE-600BR (connected through USB to PC),
- Windows 7 64-bit Ultimate.
Here's what I've tried without any success (the PC keeps turning on by itself during the night and afternoon):
- In Windows, disabled the Wake from Sleep in every power profile,
- Ran different anti-virus and anti-malware software (got no infections),
- Disabled Wake on LAN in BIOS,
- Disabled all other boot and wake up options in BIOS,
- Disabled boot from external and USB devices,
- Connected the power supply directly to the wall power outlet (instead of coming through the APC power backup unit),
- Removed all USB external devices (keyboard, mouse, APC backup unit),
- Removed LAN cable,
- Disabled all Wake on LAN options in the Ethernet card options in Windows Device Manager,
- Replaced the power switch wires for the reset wires in motherboard front panel connector (power/reset/led),
- Removed the power switch wires (1 pair, mentioned above) from the motherboard front panel connector,
- Reset BIOS to its default,
- Flashed BIOS again (to latest version 0132),
- Installed latest device drivers,
- Installed latest SSD Tool,
- Flashed SSD to latest firmware.
The only thing that really seems to work is to enable "Deep S4/S5" in BIOS, but I think this worked around the problem and didn't go to what really caused it.
I'm afraid the cause of the unusual "turn ons" can lead to other problems, like ruining some other PC components (drives, memory, etc.) or onboard devices (like USB ports, VGA, keyboard controller, etc.).
- Even when the PC is off (shutdown S5 state) with "deep S4/S5" enabled, the keyboard numlock and function (MS keyboard) leds sometimes are lit.
- Hibernate option is disabled to free up space in the SSD boot drive.
- I'm not used to put my PC to the stand by mode, only shutdown.
- Intel Desktop Utilities is not installed since all versions up to the current one (3.2.1.042a) are presenting some sort of compatibility issues with Windows and the resident/running services, causing latency peaks leading to audio and video drop-outs (as I posted in another discussion).
- I bought and assembled this PC in April/2011.
- I also forgot to tell that I have no pets at home.
Thank you very much.