Question about Logitech Cordless Desktop MX 3000 Keyboard/Mouse

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Keyboard crescent key

Anybody knows what the Crescent Key on the upper left side of the keyboard does? Can't find it anywhere. Thanks for your help.

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The crescent key is called a sleep key. The Sleep key is used to put the computer into ACPI state G1 Sleeping from ACPI state G0 Working. The Advanced Configuration and Power Interface (ACPI) specification is an open industry standard first released in December 1996 developed by HP, Intel, Microsoft, Phoenix and Toshiba that defines common interfaces for hardware recognition, motherboard and device configuration and power management. According to its specification[1], "ACPI is the key element in Operating System-directed configuration and Power Management (OSPM)". try wikipedia.org to find out about g1 nd g0 hope this helped

Posted on Jul 30, 2007

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That's the Sleep button, and you may not have it configured to do anything. If you'd like to change that, go into Start\Settings\Control Panel\Power Options and click on the Advanced Tab. From there you can select several options for the Sleep button.

Posted on Jul 30, 2007

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Posted on Jan 02, 2017

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1 Answer

Use of crescent key above escape key in model HP 5187-7583 Silver Multimedia Keyboard With Media Player


The crescent key is for the computer to go night night!
Look under power settings in control panel this could be a key that can be reprogrammed. Usually out of the box it will but the computer into sleep mode.

For some key boarda the "Fn" key and crescent both need to be depressed.

Shaking the mouse or hitting space bar will wake up the computer.

Hope this helps?
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Jun 20, 2016 | HP 5187-7583 Silver Multimedia Keyboard...

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I am trying to find out what the blue symbols on the function keys of my sk 9020 keyboard stand for


The blue keys serve as a secondary function for your volume control, monitor controls and pause play fast forward rewind (in media mode). In order to use the blue keys that are numbered from F1 to F12, you must depress and hold the Fn key that is located at the bottom left side of the keyboard. Here is a way to test it: Open up any file that plays sound for longer than 1 minute (60 seconds). While this file is playing, hold down the Fn key and simultaneously press F8 and listen to the volume get louder or Fn and F7 together and listen to the sound get lower. The picture of the crescent moon F1 will adjust the brightness of your screen. F2 will magnify your screen. F3 will take you to your email. F4 will take you to your internet home page. F6 will mute the volume. F7 will lower the volume. F8 will raise the volume. F9 will rewind your video playing. F10 will stop the video. F11 will pause or play the video. F12 will fast forward the video.

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1 Answer

I do not know where the sleep button on my HP laptop is located.


It's a Fn key combination on the keyboard.
Press and hold the Fn key down and then press the key with the crescent moon icon it.

This is the equivalent of the sleep button.

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There is a + key (same key as = key) on the keyboard. Try looking in the upper right area of the keyboard to the left of the backspace key. Press the shift button and the + button to type the + symbol.
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Dumb question


hold Fn key while pressing other "green" key

Thanks for using FixYa - a FixYa rating is appreciated!!

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