Cant wake computer from sleep or reboot Tags: Prebuilt Sleep Mode Computer Fan Systems Last response: March 14, 2012 9:34 PM in Systems Share Chris1954 March 14, 2012 1:06:45 PM Hi, Inadvertently keyed fn+F2 which put pc into sleep mode. It will not wake or reboot, just has fan running if powered on. More about : wake computer sleep reboot | E-mail me updates | Report abuse Register or log in to remove jrwizbang March 14, 2012 6:47:19 PM Flash your bios | Report abuse tsnor March 14, 2012 9:34:47 PM There are options for what devices will wake a system from sleep. I personally turn off the mouse -- I don't like vibrations moving the mouse and starting the system. Did you try holding down the fn+f2 combination or the 'windows key' or just 'function key' for a count of 5 ? Then release. Then wait 30 seconds while video gets itself together. From: http://support.microsoft.com/kb/266283 " Open the Keyboard control panel item, as described in Method 1. Click the Hardware tab, and then click Properties. Click the Change Settings button Note This step requires Administrator access Click the Power Management tab, and then verify that the Allow this device to wake the computer is enabled. Click OK, and then click OK again." Also, very rarely my PC will come out of sleep but my samsung t240hd monitor (which I love because its 1920X1200) doesn't detect video signal until i cycle it through the it's input options. | Report abuse Ask the community Publish Tom's Hardware>Forum>Systems>Cant wake computer from sleep or reboot> Related ressources: ForumLazy computer went to sleep ... won't wake ... won't cold boot ForumWhy cant i wake my computer up via mouse movement? ctr alt delete does nothing ForumWhy cant i wake my computer up via mouse movement? ForumComputer crashes when waking from sleep ForumPC tries to wake up from sleep but can't !! ForumMonitor won't wake up from sleep . ForumComputer won't wake up from sleep mode ForumComputer wont wake from sleep - in a coma ForumWin 7 PC won't wake from longer sleep ForumIntermittent problem: 5 beeps on post and no wake from monitor sleep ForumWindows 7 Home built system will not wake from sleep /hibernation ForumNewly built pc wont wake from sleep properly ForumHTPC Mobo+CPU ~$150 Forum[Solved] New gaming computer $1300-$1500 range ForumUpgrade from MSI 870a-g54 to ?????? ForumComputer Appraisal Question. ForumComputer Keeps Crashing ForumBuilding a computer ForumComputer makes noise though headset ForumMy gaming computer build More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !