Question about HP Compaq Presario R4000 Notebook

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Compaq Presario R 4000 to dark when on battery only.

I checked power options and set to minimum battery. Also pressed f5 ( moon icon key) and arrow up key, nothing. Please help. HP tech support charges for any kind of help. I will never buy another HP product again.

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  • pontelemon
    pontelemon May 11, 2010

    When you plug AC adapter, is LCD getting brighter?

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The R4000, or at least mine will appear to be brighter when on battery also. If you press the function key and then the f8 key it will brighten the screen.

Posted on Apr 18, 2009

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HP Compaq Presario R4000 (PN495AV) PC Notebook How


Yes, go to Start>Control panel>Power Options. There also should be a screen brightness key on your key board, that looks like a sun shining, with arrows pointing up & down. To use that key, hit the FN key, right next to the Ctrl key. Push & hold the FN key, while pushing the up arrow. That should increase the brightness of your display. Good luck.

Jul 06, 2011 | HP Compaq Presario R4000 Notebook

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Is there any way to brighten my screen on my acer aspire 5601 lap top


Examine the keyboard. There should be a symbol on most of the function keys (F1, F2, etc.). Look for one that looks like a sun or lightbulb, either with an arrow pointing up or with the sun/lighbulb filled in. Hold the 'Fn' key, and tap the up/bright sun/lightbulb key a few times. The screen should increase in brightness.

If you cannot find the specified keys, you may be able to adjust brightness from inside Windows. Right click on the battery icon in the taskbar and open 'power options'. Look for a sun and moon with a sliding bar between them. You might also be able to adjust brightness by customizing your desktop (right click on the desktop and look for the proper menu).

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How do I adjust the brightness on my laptop? Its a Compaq Presario V2140US


1. Press down the Fn key at the lower left end of your Compaq Presario keyboard. Keep the button held down and tap the F7 key to decrease the screen brightness by one step.

2. Tap the F7 key again with the Fn key still depressed to further decrease the brightness by one step. Continue hitting the F7 key until you reach the minimum LCD screen brightness.

3. Hold down the Fn key and tap the F8 key to increase the Presario's LCD screen brightness by one step. Keep pressing the F8 key until you reach the maximum brightness for your screen

Mar 01, 2011 | Microsoft Compaq Presario C501nr Notebook

1 Answer

Set up bios hp compaq presario v2000


1. restart you computer and enter bios screen by pressing f1 or f10 at first screen
2. set bios as you like, or press f5 tkey to load the default bios configuration
3. select yes using arrow key, and then press enter
4. press the f10 key to save the setting and exit
5. select yes using arrow keys and press enter
for more isformation about hp compaq bios see this page
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=120&prodSeriesId=409741&prodTypeId=12454&objectID=c00220813
i hope this helpfull
thanks for using fixya

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My Compaq keyboard has a key with an icon shaped like a moon. What is that for? Also, ovedr the number pad, there is a light on the right that has an arrow pointing down. What is that light for. Also, my...


The Moon key is for putting your computer to sleep, the keypad light is probably the NUM LOCK LIGHT. When your screen blacks out will it come on again if you press enter on click the mouse button? if so, go into the control panel, click on the power options and look for the icon marked 'Screen' or something similiar. Change the timing to an hour or so...

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2 Answers

Laptop screen goes dark.


Is your computer setup to go to sleep when you close the lid?

Click on start -->control panel-->power options and then check the option that says choose what closing the lid does. You have to change this setting to 'do nothing' if you want the computer to stay on when you close the lid.

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Dark screen if unhooked from battery


You can use the function keys to increase the brightness. Also if you go to Start, Control Panel, Power Options you can change the settings to give you more monitor time.

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1 Answer

My computer has no sound .i have compaq presario c700.windows xp


You should have the speaker wire plugged into the green hole.
You need to have the correct speakers. Powered ones are best, but they need either batteries or an AC adapter.
You need to be sure the sound drivers are installed on your computer. You can go into the control panel and click on the "sounds and audio devices" icon. It should tell you at the top what audio device is installed, and then check to be sure the volume it up over 1/2 and also that the "mute" box is not checked. Then go to sounds tab on that window. The sounds are listed at the bottom of the window. Any sound with a little speaker beside it should play a sound when you press the dark arrow to the right of the sound. If the arrow is not dark, then there are no sound drivers installed on the computer and you'll have to find out why--but that's another issue.

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Everything on my compaq presario cq50-215nr laptop got really big after i accidentally hit a couple of buttons on the keyboard and i dont know what i hit. how do i make them go back to normal size


Choose Screen Resolution For higher legibility of documents on screen, you can adjust the screen resolution of your monitor (for monitors that support more than one screen resolution option). The higher the number of pixels, the more information you can display on your screen and the smaller items appear. Lower screen resolution makes items appear larger and can benefit people with vision impairments. This procedure tells you how to adjust screen resolution through Display Properties in Control Panel.
Mouse actions Keyboard actions 1 On the Start menu:
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Display the Start menu by pressing CTRL+ESC (or the Windows logo key winkey.gif).
  • Select Control Panel by pressing C.
2 In Control Panel:
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  • If not, under Control Panel in the left pane, select Switch to Classic View.
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In Control Panel:
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  • If not, under Control Panel in the left pane, select Switch to Classic View by pressing TAB.
  • Press ENTER.
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  • Press ENTER.
3 In the Display Properties dialog box:
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In the Display Properties dialog box:
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4 On the Settings tab, under Screen Resolution:
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  • Select OK.
On the Settings tab:
  • Move to the Screen resolution slider by pressing ALT+S.
  • Choose a screen resolution value by pressing the RIGHT ARROW or LEFT ARROW key.
  • Press ENTER.
5 To close Control Panel:
  • Select the Close button.
To close Control Panel:
  • Press ALT+F, C.

screenresolution.jpg Control Panel: Display: Settings tab: Screen resolution

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Sounds like the auto-dim in the BIOS is set too low. Fortunately the Compaq R3000 allows you to adjust the brightness right from the keyboard. Hold down the [FN] function key while tapping the [F8] key will brighten the screen, while [FN]-[F7] will dim it. The settings are different for running on AC power and battery, so you must do each individually.

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