How to Identify LCD Screen Trouble on a Compaq Presario

Written by c.d. crowder Google
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Though some signs of LCD screen trouble are obvious, other problems may not stand out on your Compaq Presario unless you know what to look for. Learn to identify LCD screen trouble on a Compaq Presario, as this will lead you to the cause of the issue. LCD screen problems can be as severe as the screen staying black or as simple as pixels being too dark or light. LCD screen trouble on your Compaq Presario doesn't mean the screen is broken. Most problems are fixable by changing settings or updating drivers.

Skill level:

Things you need

  • Non-abrasive towel or cloth
  • External monitor

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  1. 1

    Clean your LCD screen with a non-abrasive towel or cloth. You can also use LCD cleaning cloths. This solves some problems with areas of the screen seeming too light, too dark or fuzzy.

  2. 2

    Change the display resolution if you notice a blurry, shrunk or stretched image. Click "Start," open "Control Panel," choose "Appearance and Personalization" and click "Adjust Screen Resolution." Alter the resolution until the display is normal.

  3. 3

    Contact an HP support technician if your Compaq Presario LCD screen continuously flickers, displays vertical lines in different parts of the screen, a solid green horizontal lines appears or the display colours are not correct no matter how you change the resolution. These problems often indicate problems with your system hardware or the LCD screen itself.

  4. 4

    Perform a hard reset if your LCD screen remains black with no error messages appearing. Disconnect all devices and external drives. Turn off your Compaq Presario, disconnect the adaptor and remove the battery. Press and hold the power button for at least 15 seconds.

  5. 5

    Reconnect the AC adaptor, but not the battery. Press the power button and look for the lights near the caps lock and num lock keys. Listen for typical operating sounds like the fan or disk drive. If images appear, turn off your computer and reinsert the battery.

  6. 6

    Connect an external monitor if you have one available. This will test whether the problem is the graphics card or the LCD screen. Depending on your Compaq Presario model, press the correct key -- always a function key -- to display your screen on the second monitor. If an image appears, restart your computer, press "F8" during the boot process and choose "Enable low-resolution video." Visit your graphics card manufacturer or HP support to download the latest drivers.

  7. 7

    Download the latest drivers for your graphics card if you have recently installed a new graphics card or installed a new operating system and notice screen problems.

Tips and warnings

  • If your LCD screen is cracked or you notice large black spots on the screen, the screen itself is damaged and must be replaced.
  • A technician will step you through tests to determine what hardware may be faulty so you only need to replace the problem hardware instead of the entire computer.
  • Never spray chemicals on your Compaq Presario LCD screen. This can damage the screen.

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