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Same Problem I have the same exact problem! The only thing that I can do is pressing Fn + F4 to put it to sleep temporarily and restarting it until it clears up. It's incredibly annoying.

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Function keys not working on hp probook 4440


Identifying the hot keys
A hot key is a combination of the fn key and either the esc key or one of the function keys.
To use a hot key:
Briefly press the fn key, and then briefly press the second key of the hot key combination.
Hot key combination Description
fn+esc Displays information about system hardware components and the system BIOS version number.
fn+f1 Initiates Sleep, which saves your information in system memory. The display and other system
components turn off and power is conserved.
To exit Sleep, briefly press the power button.
CAUTION: To reduce the risk of information loss, save your work before initiating Sleep.
fn+f2 Decreases the screen brightness level.
fn+f3 Increases the screen brightness level.
fn+f4 Switches the screen image among display devices connected to the system. For example, if a
monitor is connected to the computer, fn+f4 alternates the screen image from computer display to
monitor display to simultaneous display on both the computer and the monitor.
Most external monitors receive video information from the computer using the external VGA video
standard. The fn+f4 hot key can also alternate images among other devices that are receiving video
information from the computer.
fn+f5 Initiates the QuickLock security feature. QuickLock protects your information by displaying the
operating system Log On window. While the Log On window is displayed, the computer cannot be
accessed until a Windows user password or a Windows administrator password is entered.
NOTE: Before you can use QuickLock, you must set a Windows user password or a Windows
administrator password. For instructions, see Help and Support. To access Help and support, from
the Start screen, type help, and then select Help and Support.
fn+f6 Displays charge information for all installed batteries. The display indicates which batteries are
charging and reports the amount of charge remaining in each battery.
fn+f7 Mutes or restores speaker sound.
fn+f8 Decreases speaker volume.
fn+f9 Increases speaker volume.
fn+f10 Plays the previous track of an audio CD or the previous section of a DVD or a BD.
32 Chapter 4 Pointing devices and keyboardHot key combination Description
fn+f11 Plays, pauses, or resumes an audio CD, a DVD, or a BD.
fn+f12 Plays the next track of an audio CD or the next section of a DVD or a BD.



http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c03555111-1.pdf

Mar 16, 2014 | HP 4440s Probook

Tip

How to use F1, F2 ?..Function buttons on Hp laptop.


For those who do not know how to use the F1, F2, F3..... buttons on HP laptops, here is an opportunity for you to know.

We see these buttons on most laptops but don't know what they are used for. F1, F2....... buttons are the first set of buttons on the keyboard. These buttons makes it easy for anyone to access some programs on the computer without using mouse.

Follow the below procedures on how to use some of these functions:

To put your HP laptop on sleep mode, Press and hold Fn button on your keyboard, (without leaving it) then press F5 (Fn + F4).

To lock your HP laptop, Press and hold, Fn button, then press F6 (Fn + F6).

To reduce the brightness of your HP laptop, press and hold Fn button, then press F7 (Fn + F7).

To increase the brightness of your HP laptop, Press and hold Fn button, then press F8 (Fn + F8).

To put your laptop on mute, Press and hold Fn button, then press F9 (Fn + F8).

To reduce the volume of your HP laptop, Press and hold Fn button, then press F11 (Fn + F11).

To increase the volume of your HP laptop, Press and hold Fn button, then press F12 (Fn + F12).

To shut down your laptop or to view other shut down options, Press and hold Alt button, then press F4 (Alt + F4). Note that this particular function can be used on all computers and laptops.

To close any page on your HP laptop, Press and hold Alt button, then press F4 (Alt + F4). Note that this particular function can be used on all computers and laptops.

Good luck.

on Nov 06, 2010 | Computers & Internet

Tip

How to use F1, F2 ?..Function buttons on Acer laptop.


For those who do not know how to use the F1, F2, F3..... buttons on Acer laptops, here is an opportunity for you to know.

We see these buttons on most laptops but don't know what they are used for. F1, F2....... buttons are the first set of buttons on the keyboard. These buttons makes it easy for anyone to access some programs on the computer without using mouse.

Follow the below procedures on how to use some of these functions

>To put your Acer laptop on stand-by or to view shut down options, Press and hold Fn button on your keyboard, (without leaving it) then press F4 (Fn + F4).

>To make your Acer laptop be on sleep mode, Press and hold, Fn button, then press F6 (Fn + F6).

>To lock your Acer laptop's Touchpad, press and hold Fn button, then press F7 (Fn + F7).

>To put your Acer laptop on mute Press and hold Fn button, then press F8 (Fn + F8).

>To shut down your laptop or to view other shut down options, Press and hold Alt button, then press F4 (Alt + F4). Note that this particular function can be used on all computers and laptops.

>To close any page on your Acer laptop, Press and hold Alt button, then press F4 (Alt + F4). Note that this particular function can be used on all computers and laptops.

Good luck.

on Oct 23, 2010 | Computers & Internet

1 Answer

Neither Sleep nor Hibernate are available as options when I go to the Start menu on my Lenovo T410. They appear grayed out in the list that contains 'Switch User', 'Lock' and 'Restart'. Pressing Fn-F4...


Go to:
Control Panel\System and Security\Power Options\Edit Plan Settings

Choose Change advanced power settings link.
Here you can enable Sleep/Hibernate etc.

Sep 14, 2013 | IBM ThinkPad T41 Notebook

1 Answer

Hp laptop no longer connects to external display via fn + f4


The Fn+F4 button toggles between the LCD and external monitor.
From LCD only or both LCD and external monitor or external monitor.
only. Press the Fn+F4 keys again to toggle the various screen selections.

Sep 16, 2012 | Computers & Internet

1 Answer

Fn+F4


If you are using hibernation mode it causes all kinds of problems, not working, corrupting window files so you are forced to do a fresh install. The reason is windows needs to be properly shut down, other wise it will become unstable to the point you won't be able to access files. I strongly reommend to disable this function or at the very least make a backup recovery disc.

Apr 12, 2012 | Acer TravelMate Computers & Internet

4 Answers

I need to know what the keys f1-f12 keys usage.


The uses for the function (f1-f12) keys varies based on which program you have open at the time. Different programs use them for different things.

However, your computer also has some default uses for these keys when combined with pressing the fn (function) key.

fn + f1 locks computer

fn + f2 changes our power use profile

fn + f3 puts the computer to sleep

fn + f4 puts the computer into hibernation mode

fn + f5 changes the display/output mode

fn + f6 decreases the screen brightness

fn + f7 increases the screen brightness

fn + f8 enables/disables wireless connections

fn + f9 enables/disables the touch pad

fn + f10 turns the cursor overlay on/off

fn + f11 turns the numeric overlay on/off

fn + f12 turns scroll lock on/off

May 05, 2011 | Toshiba Satellite Pro L300 Notebook

3 Answers

The display is black


If you can still hear everything else working try adjusting the brightness, there should be keys to do this on the keyboard, if it has no effect i suspect your lcd back light has gone.

Jan 20, 2010 | Fujitsu Siemens AMILO Xi 1546 Notebook

1 Answer

When I press fn and f4 the computer does not sleep. What should I do to correct this


Go to Power Options and select 'Choose what the buttons do'. You might have changed the option for 'When I press the Sleep button'. Revert it back to sleep.

Sep 23, 2009 | Lenovo 3000 N500 Notebook

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