Question about HP ProBook 4540s Notebook PC ENERGY STAR

4 Answers

Function buttons not working (volume control, brightness, locking, etc.)

I have a problem with function buttons, they doesn't work, so first i tried find some drivers but i can't find it. can you help me with this?

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4 Answers

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  • HP Master
  • 1,824 Answers

Hi,
Try using Fn key + the F1-12 buttons.

Hope that the issue is that simple, please reply to this: did it or it didn't help.

Posted on Jan 11, 2013

  • 1 more comment 
  • Raninderjit Singh Sep 30, 2013

    did not

  • Janis
    Janis Sep 30, 2013

    Alt/ Fn key. Also, try looking at the manual for instructions as to using the keys.

  • Janis
    Janis Sep 30, 2013

    There might be a setting for enabling and disabling the FN keys.

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  • Contributor
  • 1 Answer

Amrendra Kumar Singh

Same issue with me i was bought 2 hp 4540s laptop's having same problem with them. Any solution Please?

Posted on Feb 25, 2013

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Having same problm my wi fi iz working but blue tooth not working wat shud i do???? now i hate hp lapiez
umer 0346920053

Posted on Aug 03, 2013

  • Janis
    Janis Sep 30, 2013

    Hi, please call them directly for support.

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Why there don't seem to be any way to control function keys and on my Bluetooth in Hp Probook 4540s??? plz help me

Posted on Jan 13, 2013

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Posted on Jan 02, 2017

SOURCE: loaded windows 7 ultimate and

try this

press f3 to increase the brightness, f2 to decrease

or,

hold fn key and press f3 to increase the brightness
fn+f2 to decrease

let me know if it works

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bronk50
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SOURCE: flashing lights with no fans, held power button down & now only red lights (internet adapter, volume button) & fans are working why? help?

this sounds like a hardware or driver issue
restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer

you could select the option start at last known configuration that worked this will tell you if and what file has been corrupted or missing then you will know if its a hardware issue



test all leads that attach to your hard drive including electrical extensions

the leads from your ((motherboard to your hard drive)) Sata make sure they have dust free secure connection and are not faulty or just replace them they could be faulty

make sure all leads that are attached to your drives dvd\cd have secure connections and are not faulty or just replace them they could be faulty ?


even something as small as an electrical extension or a faulty fan lead can cause this problem a computer needs all of the data and electrical current to travel through every working device and to have an end for a computer to be able work properly

make sure your graphics card is securely seated with no dust


if you remove the graphics card to clean the socket replace it

restart the computer the found new hardware wizard should activate


or you might try


Restart your computer
during the boot process you will see on the screen a certain key to press usually the Delete or F2 to enter setup
Press and hold that key during the boot up process to enter BIOS using the arrow keys you can load failsafe defaults or load optimized defaults press escape then press f10 to save to cmos to restart
hope it helps

Posted on May 10, 2012

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