BenQ GW2450, GW2750HM, GW2255 user manual Troubleshooting, Frequently asked questions FAQ

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Troubleshooting

Frequently asked questions (FAQ)

The image is blurred:

Read the instructions on the link "Adjusting the Screen Resolution" on the CD, and then select the correct resolution, refresh rate and make adjustments based on these instructions

How do you use a VGA extension cable?

Remove the extension cable for the test. Is the image now in focus? If not, optimize the image by working through the instructions in the "Adjusting the refresh rate" section on the link "Adjusting the Screen Resolution". It is normal for blurring to occur due to conduction losses in extension cables. You can minimize these losses by using an extension cable with better conduction quality or with a built-in booster.

Does the blurring only occur at resolutions lower than the native (maximum) resolution?

Read the instructions on the link "Adjusting the Screen Resolution" on the CD. Select the native resolution.

Pixel errors can be seen:

One of several pixels is permanently black, one or more pixels are permanently white, one or more pixels are permanently red, green, blue or another color.

Clean the LCD screen.

Cycle power on-off.

These are pixels that are permanently on or off and is a natural defect that occurs in LCD technology.

The image has a faulty coloration:

It has a yellow, blue or pink appearance.

Select MENU > PICTURE > Color > Reset Color, and then choose “YES” in the “Caution” message box to reset the color settings to the factory defaults.

If the image is still not correct and the OSD also has faulty coloration, this means one of the three primary colors is missing in the signal input. Now check the signal cable connectors. If any pin is bent or broken off, please contact your dealer to get necessary support.

No image can be seen:

Is the prompt on the display illuminated in green?

If the LED is illuminated in green and there is a message “Out of Range” on the screen, this means you are using a display mode that this monitor does not support, please change the setting to one of the supported mode. Please read the “Preset display modes” section from the link "Adjusting the Screen Resolution".

Faint shadow from the static image displayed is visible on the screen:

• Activate the power management function to let your computer and monitor go into a low power "sleep" mode when not actively in use.

• Use a screensaver to prevent the occurrence of image retention.

38 Troubleshooting

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Contents LCD Monitor Copyright Power SafetyCare And Cleaning DisclaimerBenQ ecoFACTS Table of Contents Getting started CD-ROMGetting started Back view Getting to know your monitorFront view Input and output ports How to assemble your monitor hardware Attach the monitor base+15 Connect the video cable Connect the audio cable for models with speakersConnect the power cable to the monitor Connect-to and turn-on the powerRemove the monitor stand How to detach the basePrepare the monitor and area Using the monitor wall mounting kit Remove the monitor baseGetting the most from your BenQ monitor How to install the monitor on a new computer Driver files Suitable modelsHow to upgrade the monitor on an existing computer How to install on Windows 8 system selected models only Open Display PropertiesHow to install on Windows 7 system How to install on Windows Vista systems Picture optimization How to adjust your monitor Control panelVolume hot key for models with speakers Hot key modeDisplay Mode hot key for models without speakers Mode hot keyMain menu mode Display menu Function Operation RangeFunction Operation Range Picture menu PictureYES AMA OFFPicture Advanced menu Picture AdvancedOverscan Slightly enlarges Hdmi RGB RGBYUV Audio menu System menu DVIPolish Operations will be disabled DDC/CIHow to adjust your monitor Troubleshooting Frequently asked questions FAQNeed more help?