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How to turn off the screen rotation in hp probook 4540s?

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: could you give me support to how to enable hp finger sensor

Go to this HP WEB site and follow the instructions.

Posted on Oct 14, 2012

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SOURCE: Screen won't brighten

On Battery or Plugged in? You didn't post the OS you are using, Open the Power Options, set to High Performance, open Change Plan settings, Adjust to your preference, Change Advanced settings to your preference.

Posted on Mar 11, 2013

  • 32281 Answers

SOURCE: hp probook 4540s integrated webcam not working anybody can help me..?

Try re-installing the WEBcam driver.
You can download the WEBcam and device drivers from the Compaq/HP WEB support/download page. Make sure you select your model laptop and the Windows drivers you require and install them. Click on this link to download the drivers: -

Posted on Apr 14, 2013

  • 16 Answers

SOURCE: hp probook 4540s integrated webcam not working plz anyone can help

you need to go to your device manager to see if it showing up there under image device if it is uninstall it reboot it should come up an fine it again and install drivers if not one of 2 things has happened ether the cam it self went bad or it was truned off in the bios you check that by restarting pc and going f1 or f2 to enter set up and look for web cam see if it is on or off

Posted on Apr 14, 2013

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1 Answer

How do I enable touchpad on my HP Laptop Probok 4540s?

Check the top row of keys for a touchpad symbol (box with finger pointing hand) if blue you will need to press it and the Fn key together or a button above the touchpad.

Sep 02, 2014 | HP 15.6" ProBook 4540s B5P37UT Laptop PC...

1 Answer

HP probook 4540s plugged in not charging

Simply unplug the power from the adapter, leave for some minutes then reconnect.

Dec 23, 2013 | HP ProBook 4540s Notebook PC ENERGY STAR

1 Answer

Which driver I need for HP probook 4540s

Go to and navigate to your laptop. Download any drivers that you require for the touch pad. If in doubt, there are a few but it will not hurt to download them all and then install them. You will have the latest updates then.

Dec 01, 2013 | HP ProBook 4540s B5P39UT Notebook PC - 3rd...

1 Answer

Hp 4540s locking function is not i correct it?

Do you mean the locking function on the screen when you close it?

Feb 28, 2013 | HP ProBook 4540s Notebook PC ENERGY STAR

4 Answers

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

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.

Jan 11, 2013 | HP ProBook 4540s Notebook PC ENERGY STAR

1 Answer

Probook 4530s headphone not working

I had this problem with probook 4540s. I installed the drivers from HP site, but the problem didn't solve. Then I found that unchecking Playback devices > Properties (Speakers) > Advanced > Enable audio enhancements, did solve the problem.

Jun 03, 2012 | HEWLETT-PACKARD Probook 4530S

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