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If you cannot resume computer operation from any of these methods, you may have encountered a system problem. Quickly press the power button on the computer. You may be able to resume operation by trying one of the following: I cannot wake up my computer after pressing the Sleep key For information about Windows power management settings, see Windows Help. If power management is not enabled, this key will not work. The Sleep key puts the computer into power management mode (such as standby, suspend, or hibernation) only if the computer supports power management and has it enabled. On some keyboards, the Print Screen key only works if F Lock is on. If your keyboard has an F Lock key, press it to toggle between Function key modes. To use the image, start an application that uses graphics, such as Microsoft Paint, and use the Paste function. The Print Screen key copies an image of the screen to the clipboard (not the printer). If your keyboard has an Fn key, press and hold Fn while pressing the key to access the alternate commands. If the key command is printed on the front of the key (such as F5) instead of on top of the key (such as Open), then F Lock must be on for the key command to work. Depending on your keyboard model, the light (F) indicating that the F Lock key is turned on is located either on the keyboard or on the wireless receiver. Alternate function keys have two possible commands depending on if the function lock (F Lock) key is turned on or off. (Scroll Lock, Break, Insert, and alternate function keys - Help, Undo, Redo, New,Open, Close, Reply, Fwd, Send, Spell, Save, Print) Some Directional /Functional keys do not work when I press them. If the key command is printed on the front of the key (such as F5) instead of on top of the key (such as Open), the F Lock must be on for the key command to work. If your keyboard has an F Lock key, press it to toggle between Function key modes.Īlternate function keys have two possible commands depending on if the function lock (F Lock) key is turned on or off. On some keyboard models, these keys are touch-sensitive. These keys are on the top row of the keyboard.