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HP Pavilion dv6-1325sa Entertainment Notebook PC support

Troubleshooting problems with notebook displays (Windows 8, Windows 7)

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This document pertains to HP notebook computers with Windows 8 or Windows 7.
This document provides solutions to a variety of problems that can occur with notebook displays such as blurry text, poor video performance, black or white screens, or damaged hardware. Find a section below that matches the problem with your display, and then follow the steps to resolve the issue.
Fuzzy text, images that are slightly blurry around the edges, or images that are stretched and out of proportion can result from improper screen resolution, incorrect graphics driver settings, or outdated BIOS or graphics drivers.
Figure 1: Blurry display
Notebook with a blurred display
Figure 2: Correct display
Notebook with a correct display
Figure 3: Stretched image
Notebook displaying a stretched image
Figure 4: Image displayed correctly
Notebook displaying an image correctly
Use the following steps to resolve a fuzzy, blurry, or stretched display:

Step 1: Restart the computer

Some display problems resolve automatically when the computer is restarted.
If the image and text quality are corrected after restarting the computer, you are done troubleshooting.
If the problem persists, continue to the next step.

Step 2: Adjust the display resolution

Some problems with the notebook display resolution can be resolved by adjusting the resolution. For instance, video games often switch the resolution while the game is running in order to optimize frame rates and graphic quality. If such a game shuts down or exits improperly, the resolution might not be restored to the original settings.
NOTE:The native (recommended) display resolution should produce the sharpest, most precise image on the screen. Resolutions above or below the native display resolution can cause a fuzzy or otherwise distorted display.
Use the steps in one of the following sections, depending on your operating system, to adjust the display resolution:
To adjust the display resolution on a computer running Windows 8, use the following steps:
  1. At the Start screen, type Adjust screen resolution to open the Search charm. Click Adjust screen resolution from the list of results.
  2. Click the drop-down menu next to Resolution.
  3. Move the slider bar to Recommended display resolution, and then click OK.
    Figure 5: Screen resolution adjustment
    Windows  screen resolution adjustment slider set to the recommended display resolution
    If the image and text quality are corrected after adjusting the resolution, you are done troubleshooting.
    If the problem continues, continue to the next step.
To adjust the display resolution on a computer running Windows 7, use the following steps:
  1. Click Start, enter resolution in the search field, and then select the Adjust screen resolution Control Panel application from the search results list.
  2. Click the drop-down menu next to Resolution.
  3. Move the slider bar to the native display resolution, and then click OK.
    Figure 6: Screen resolution adjustment
    Windows  screen resolution adjustment slider
    If the image and text quality are corrected after adjusting the resolution, you are done troubleshooting.
    If the problem continues, continue to the next step.

Step 3: Update the graphics driver software

Some image and text quality issues can be corrected by installing an updated graphics driver. Automatically search for updated graphics driver software using HP Support Assistant (recommended), or using Device Manager.
Use the steps in one of the following sections to update the graphics driver software:
HP Support Assistant (HPSA) is the recommended tool to automatically find updates for your computer. HPSA checks the product-specific resources for your HP computer, and finds updates for the graphics driver suite and the LCD panel, if available.
NOTE:HP recommends that you download and install the latest version of HPSA. For information about updating HPSA, see Using HP Support Assistant (Windows 8) or Using HP Support Assistant (Windows 7, Windows Vista) .
Use the following steps to find updates in HPSA version 7 or higher:
  1. Open HP Support Assistant.
  2. Click Updates and tune-ups.
    Figure 7: Updates and tune-ups
    Updates and tune-ups in HP Support Assistant
  3. Select HP updates from the left navigation panel, and then click Check for HP updates now.
    Figure 8: Check for HP updates now
    Check for HP updates now in HP Support Assistant
  4. If a graphics driver update is available, the update displays in HP Support Assistant, along with any other available updates for your computer. Follow the on-screen instructions to install the updates.
Use the following steps to find updates in HPSA version 6 or 6.1:
  1. Open HP Support Assistant.
  2. Click Maintain.
    Figure 9: Maintain
    Maintain section on the HP Support Assistant home screen
  3. Click Refresh to run a health analysis.
  4. When the analysis is complete, click the View analysis button to see the results.
  5. If a graphics driver update is available, select the update and click Apply.
Use the following steps to search for and install updated graphics driver software in Windows 8:
  1. At the Start screen, type device manager to open the Search charm. Click Device Manager from the list of results.
  2. In the Device Manager, expand the Display adapters category, right-click the display chipset or graphics driver, and then select Update Driver Software.
    Figure 10: Device Manager - Update Driver Software
    Update Drivers Software option in Device Manager
  3. When prompted on where to search for the updated drivers, select Search automatically for updated driver software.
    Figure 11: Search automatically
    Search automatically for updated driver software
    If Windows detects and installs updated graphics drivers and the image and text quality are corrected, you are done troubleshooting.
    If Windows does not detect and install updated drivers or the image and text quality issue persists after updated drivers are installed, continue to the next step.
Use the following steps to search for and install updated graphics driver software in Windows 7:
  1. Click Start, enter device in the search field, and then select Device Manager from the list of results.
  2. In the Device Manager, expand the Display adapters category, right-click the display chipset or graphics driver, and then select Update Driver Software.
    Figure 12: Device Manager - Update Driver Software
    Update Driver Software option in Device Manager
  3. When prompted on where to search for the updated drivers, select Search automatically for updated driver software.
    Figure 13: Search automatically
    Search automatically for updated driver software
    If Windows detects and installs updated graphics drivers and the image and text quality are corrected, you are done troubleshooting.
    If Windows does not detect and install updated drivers or the image and text quality issue persists after updated drivers are installed, continue to the next step.

Step 4: Download and install the latest BIOS and graphics drivers from HP

Many image and text quality issues can be resolved by installing updated graphics adapter device drivers and BIOS firmware.
See the Obtaining Software and Drivers support document for more information.
If the image on the screen is normally clear but becomes distorted or choppy when running a program with high graphic requirements, try one or more of the following actions to resolve the issue:
  • Adjust display resolution - Make sure the display resolution matches the software program resolution. See Adjust the display resolution for more information.
  • Install updated graphics drivers - See the Obtaining Software and Drivers support document for more information.
  • Adjust video game resolution - See the software manufacturer's documentation for information on adjusting the video game resolution.
When you view the same image on both the notebook display and an external display panel (monitor, projector, or television), the image shown on the notebook display might shrink to a lower resolution, with black borders around the edges of the reduced display.
Figure 14: Example of black borders and screen shrinking
Notebook display with black bars around the edges, and a connected external monitor
This issue can occur when the native display resolution of the notebook and the resolution of the external monitor are not the same. When the graphic control detects two displays, it usually defaults to the lower resolution for both devices.
To resolve this issue, disconnect the external monitor to verify that the resolution on the notebook display changes back to the desired settings. Reconnect the external monitor, and then adjust the resolution settings for each device using one of the following methods:
To use Windows to control the graphic display, connect both displays, right-click on the desktop, select Screen Resolution, and then change the resolution for each display. On some models, you can select an advanced option to either Duplicate the same image on both displays or Extend the desktop image across both displays.
If the problem persists, check for and install any updates to the notebook graphics adapter and BIOS firmware. See the Obtaining Software and Drivers support document for more information.
Certain notebook models that feature a high-performance chip or secondary graphics processing unit (GPU) have an advanced graphics maintenance function. Names of advanced graphics options may vary. To use an advanced graphics maintenance function (if available) to control the graphics display, right-click on the desktop and select one of the following options:
  • Graphics or Graphics Options (Intel)
  • Vision engine or Catalyst Control (AMD)
  • Nvidia Control Panel (Nvidia)
If the problem persists, check for and install any updates to the notebook graphics adapter and BIOS firmware. See the Obtaining Software and Drivers support document for more information.
Due to the nature of LCD technology, a certain number of dots (pixels) might not display correctly. If the display has too many pixel defects within a certain area, the defects might obstruct proper viewing of images on the display.
Install the updated BIOS and graphics drivers to eliminate any potential software display problems. See the Obtaining Software and Drivers support document for more information.
For more information about pixel defects, see About LCD Panel Defects and Terminology .
Figure 15: Example of pixel defects in the display panel
Black and white pixel defects on a notebook display
The following conditions indicate a problem with the display or other notebook hardware. There are no adjustments or corrective actions for the conditions in this section.
Contact HP for assistance.
Figure 16: Flickering Screen
Notebook with flickering screen
Figure 17: Vertical lines in the display
Notebook with vertical lines in the display
Figure 18: Solid horizontal green line
Notebook with a solid horizontal green line through the display
Figure 19: Incorrect colors
Notebook with a color-tinted display
A cracked LCD displays damage in a number of different patterns. This type of physical damage can be detected as early as the BIOS-level startup operations, before the computer boots into Windows (or other operating systems). The display must be replaced. There are no actions available to correct this problem. The notebook can be used by connecting it to an external monitor.
Figure 20: Horizontal and vertical lines
Notebook display with horizontal and vertical lines
Figure 21: Diagonal or jagged lines
Notebook display with diagonal and jagged lines
HP recommends using an authorized repair center for repairing or replacing a damaged display. For additional information, see Diagnosing a Liquid Crystal Display (LCD) for Damage .
If the notebook computer screen remains black or blank, and there are no error messages on the screen, you must determine if this blank screen is caused by a problem with the display, or if it indicates a problem starting the computer.
Figure 22: Blank screen
Notebook with a blank/black screen
To test for a defective display, use the following steps:
  1. Connect the computer to an external monitor with a VGA or HDMI connector cable.
  2. Connect AC power to the notebook and the external monitor.
  3. Press the Power button on the computer, and then press the Power button on the external monitor.
    If an image displays on the external monitor but not on the notebook display, download and install the latest BIOS, the latest graphics driver, and the latest CPU chipset. See the Obtaining Software and Drivers support document for more information.
    If there is still no image on the notebook display, there is a hardware problem with the notebook display. Contact HP for repair service.
    If there is no image on either the notebook display or the external monitor, and the computer does not start properly, this indicates a startup problem, not a display problem. See Troubleshooting Black Screen Displays with No Error Messages During Startup or Boot .
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