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Monitor comes on but then goes dark as soon as you press a key on the keyboard

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Bad video card or connection

Posted on Sep 11, 2008

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Hp pavilion dv7-4165dx black screen


A blacked-out screen doesn't necessarily indicate a broken monitor.
If the computer has run out of charge or is in hibernation or sleep mode,


if the screen is too dark, or if the display cable has come disconnected from the motherboard, the screen may appear black or fail to turn on.


To fix a blacked-out laptop screen, troubleshoot the screen settings, check the LCD connector and see if the computer is awake and receiving power.


Touch the touchpad or move the external mouse to see if the computer is asleep or hibernating. If the computer fails to respond, press "Enter" on the keyboard.


Press the power button if the screen remains black.

Confirm that the power indicator light, found at the front of the computer or above the keyboard, is glowing solid green or blue.


Confirm that the power adapter is plugged into the computer and into a wall outlet. Confirm that battery indicator light is glowing solid green or blue.


Hold down the "Fn" key. Press the up-arrow to see if the screen brightness increases.
Some computers also use the "F6" or "F7" keys to increase screen brightness.


Hold down the power button for 10 seconds to turn off the laptop.
Remove the AC adapter from the computer, close the screen, and then turn the PC over.


Slide the battery latch to eject the battery. Pull the battery out of its compartment.


Turn the computer back over, open the lid, and insert the edge of a flathead screwdriver or other flat, solid object beneath the bezel above the keyboard.


Wedge the edge of the keyboard bezel off of the top cover.
Work your way along the edge of the keyboard bezel to loosen it.
Pull the bezel off the laptop.


Trace the cable coming from the laptop screen to the connector found beneath the bezel. Reconnect the display cable to the motherboard if the cable has come loose from the connector.

Line up the tabs on the bezel with the slots along the top of the keyboard. Insert the right edge of the bezel into the gap above the keyboard, and then push the bezel back in place.


Turn the computer back on. If the laptop screen is still blacked out, connect an external monitor to the video port on the side of the PC to confirm that the video card isn't defective.

If the external monitor works, the LCD screen could be broken.

If the monitor doesn't work, the motherboard or video card might need to be replaced.


Hope this helps




Nov 26, 2012 | PC Desktops

1 Answer

The monitor screen goes dark, then comes back with everything enlarged and the colors wroong. Then, it goes dark again and comes back looking normal. What's wrong and what can I do? PLEASE HELP!! ...


could be with the monitor or video card/controller. first thing is to test another monitor if available and use a working video cable. if same thing happens, test if it is stable in safe mode. Restart the computer and press F8, then select Safe Mode. If display is stable in safe mode, it would be a video controller. Uninstall the existing driver, then download the latest one for your system through Dell support site.

Sep 06, 2010 | Dell Dimension 4100 (-JM0TB01) PC Desktop

1 Answer

My monitor shuts down after one second.


Dell monitors automatically go into power-save mode after a preset amount of time when the computer is inactive. The Dell monitor will go completely black, instead of showing a screensaver. This doesn't mean that your Dell computermag-glass_10x10.gif has shut down. Instead, this allows your monitor to essentially turn off until it's needed again. You can change how long it is before the Dell monitor goes into power-save mode by changing your display settings.
  1. Step 1 Press any key on your keyboard or move your mouse. Either will turn off power-save mode. Alternately, you can press the power button on your Dell computer tower or laptop.
  2. Step 2 Press any key a second time if the monitor goes from power-save to stand-by mode. Stand-by mode allows the screensaver to appear.
  3. Step 3 Enter your user name and password into the login prompt if your computer requires a login. Press "Enter" to begin using your Dell computer.
  4. Step 4 Change the display settings on your Dell monitor to prevent your monitor from going into power-save mode prematurely. Right-click anywhere on your desktop and choose "Properties." Click the "Screensaver" tab and press "Power." Beside "Turn off Monitor," choose a time amount from the drop-down list and press "Apply."

Nov 13, 2009 | Dell Dimension 3100 PC Desktop

1 Answer

The auto-darken feature(monitor goes dark on dark


In your monitor panel you'll find 4 buttons. Press the menu button and get into Magic Bright. There you can choose the one that best suits you. You can even set to Dynamic contract where the monitor adjusts the brightness according to the elements on the screen

Jun 20, 2009 | PC Desktops

1 Answer

The LCD does goes dark after power on


you mean few second the monitor goes in black. then its come. if it happen, it is ok

Jan 21, 2009 | Sony VAIO® VGC-LS37E PC Desktop

1 Answer

Monitor won't stay on. Error message comes up that says "no input signal", then monitor goes out.


Problem with the monitor, monitor cable, or video output. For monitor, if you have more than one input, make sure it's set to the correct one. Try a different cable. Try a different monitor. Check your video card settings--if you see the BIOS bootup screen while it's coming up then the Windows splash screen, then monitor blanks out, it's a Windows display setting. Boot into safe mode, then change settings--
  • Turn the computer on or Restart the computer
  • Start tapping the F8 key. The Windows Advanced Boot Options Menu appears. If you begin tapping the F8 key too soon, some computers display a "keyboard error" message. To resolve this, restart the computer and try again.
  • Ensure that the Safe mode option is selected (the top option)
  • Press Enter. The computer then begins to start in Safe mode.
  • When you are finished with troubleshooting, close all programs and restart the computer as you normally would.

Oct 31, 2008 | HP PC Desktops

2 Answers

Keyborad problems


You might want to try typing on safe mode by pressing F8 as soon as you see the Dell Logo. If the same weird characters appear, then this would be an OS software issue. Doing Repair or OS Reinstall would resolve it. You can also try another keyboard to see if it is a keyboard problem.

Sep 17, 2008 | Dell Dimension 3000 PC Desktop

1 Answer

My dcl9a monitor goes black


How long has your computer been on when this happens? Does the power indicator light on the monitor change color when this happens? Also, if you jiggle the mouse or press a key on the keyboard, does the monitor display come back on?

Jun 21, 2008 | PC Desktops

1 Answer

Computer won't boot


turn off the system remove all the cables from the back of the computer press and hold down the power button for 10 seconds now connect just the poer cable and try to tun on the system and as soon as it turns on tab the F8 key on the keyboard and then boot into last known good configuration

May 28, 2008 | PC Desktops

1 Answer

Start up problems


This looks like a monitor problem, as the refreshing rate is set to high. Please try boot your PC in safe mode and then change the refreshing rate for lower that the monitor currently has. To get to those setting you wll need right klick your mouse on emtpy space on the desktop -> choose the last tab-> press btutton "advanced". To start PC in safe mode power on / restart computer
  1. As soon as the BIOS has finished loading, begin tapping the F8 key on your keyboard. Continue to do so until the Windows Advanced Options menu appears. If you begin tapping the F8 key too soon, some computers display a "keyboard error" message. To resolve this, restart the computer and try again.
  2. Using the arrow keys on the keyboard, scroll to and select the Safe mode menu item, and then press Enter.
This not necceserly need to be F8 key, depend on Operatin System verion and the PC itself it also can be DEL or CTRL key.

Oct 22, 2007 | E-Machines T5082 PC Desktop

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