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To begin troubleshooting this problem, please enter the BIOS (In later Intel(R) desktop boards you can enter the BIOS setup program by repeatedly pressing the <F2> key during the boot process). Go to the Power Tab, and ensure that "After Power Failure" is set to "Stay Off".
Thanks for your reply.
i checked in BIOS setting "After Power failure" is already set to "Stay Off", but still my system power on automatically.
If you let the PC boot fully into Windows and then shut it down (wating for it to fully power off with fans stopped etc) and then turn off the UPS. Are you saying that when you next turn on the UPS (having done nothing to the PC in the meantime), the PC will boot? Some add-on cards and hardware with with S5 wake-up technology can cause this behaviour on occasion but usually just unplugging the PC from the mains for 30 minutes restores things back to default.
What OS and what hardware is in the system (including the UPS) and does your UPS have any of it's own software installed/is it connected to the PC by a USB cable or just the mains outlet?
My System Config:
Intel DH67BL MotherBoard
Intel i5 2500 Processor
Corsair 4GB 1600MHZ RAM
Seagate 1TB HDD
LG DVD Drive
Corsair GS600 PSU
CM Elite 310 Cabinet
Moserbaer UPS, UPS not have any connection to CPU.
Windows 7 64bit
Since you have no additional hardware with S5 start-up support, my above comments don't apply in this case. Has the BIOS been set to default values (by using the load default values option and saving out of there)? What happens if you take the UPS out of the loop just for testing purposes - ie plug the PC directly into the mains just for testing purposes and after the PC has *fully* shut down, switch off at the mains. Switch on the mains a few minutes later and report back what happens. Are you able to test with a different PSU (perhaps swapping one out of another PC)? Is there anything plugged into the network port, if so, test with that unplugged also (just to ensure Wake on LAN isn't playing a part in this).
Do you only turn on your UPS when you want to use the PC? If so, wouldn't having the PC turning on automatically at the same time make things easier for you (not that I'm suggesting this unusual behaviour is desirable)?
Thanks for your reply. i set the Wake On LAN From S4/S5 <Stay-Off> .
now my system works fine. now i power on my system pressing the power button.
i set the Wake On LAN From S4/S5 <Stay-Off> .
now my system works fine.
If in doubt restore the BIOS settings to default values is the 'golden rule'. I'm glad it worked in this case!
Actually i updated my BIOS Version 0076 to 0125 after that only i got this problem.
Wake On LAN From S4/S5 <Stay-Off> this is essential to enable?
Sometimes new BIOS versions bring with them new functionality/options and consequently new potential problems when those settings aren't right for the whole system. After updating BIOS versions it's also worth loading BIOS optimum defaults and saving out of there. Any changes to settings after that should be remembered because (as you have found), the consequences of a 'wrong' setting can be far reaching and not always obvious.