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  Troubleshooting

7. 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.

Downloaded from ManualMonitor.com Manuals

Summary of Contents for E2420HDB

Page 1: ...Welcome LCD Monitor User Manual E2420HDB Downloaded from ManualMonitor com Manuals...

Page 2: ...vice for pluggable equipment The socket outlet should be installed near the equipment and be easily accessible This product should be operated from the type of power indicated on the marked label If y...

Page 3: ...install the monitor on a new computer 13 How to upgrade the monitor on an existing computer 14 How to install on Windows 7 system 15 How to install on Windows Vista systems 16 How to install on Windo...

Page 4: ...g items If any are missing or damaged please contact the place of purchase for a replacement BenQ LCD Monitor Monitor Base Quick Start Guide CD ROM Power Cord Picture may differ from product supplied...

Page 5: ...se in the future when you may need to transport the monitor The fitted foam packing is ideal for protecting the monitor during transport Video Cable DVI D Optional accessory for models with DVI inputs...

Page 6: ...ew Above diagram may vary depending on the model 1 AC Power Input jack 2 Cable clip 3 DVI D socket 4 D Sub socket 5 Lock switch 6 Headphone hook indicators two inverted triangles 7 Control buttons 8 P...

Page 7: ...en by clearing a flat open area on your desk and placing a soft item like the monitor packaging bag on the desk for padding Gently lay the screen face down on a flat clean padded surface While holding...

Page 8: ...lug of the DVI D cable at the end without the ferrite filter to the monitor video socket Connect the other end of the cable at the end with the ferrite filter to the computer video socket Tighten all...

Page 9: ...phone hook to place your headphone It is useful when your headphone is not in use I Hold and insert the two tabs of the headphone hook into the two slots part of the vents These two slots are located...

Page 10: ...turn it on Picture may differ from product supplied for your region Turn on the monitor by pressing the power button on the right of the monitor Turn on the computer too and follow the instructions i...

Page 11: ...item like a towel on the desk for padding before laying the screen face down on a flat clean padded surface Please be careful to prevent damage to the monitor Placing the screen surface on an object l...

Page 12: ...ou turn on your computer after connecting the monitor to your computer Windows will automatically recognize the new or different hardware and will launch its Found New Hardware wizard Follow the wizar...

Page 13: ...ld not be following these instructions You should instead be following the instructions for How to upgrade the monitor on an existing computer 1 Follow the instructions in How to assemble your monitor...

Page 14: ...river on other versions of Windows and cannot guarantee its operation on those systems Installing monitor driver software involves selecting an appropriate information file inf on the BenQ LCD Monitor...

Page 15: ...e BenQ LCD Monitor CD ROM into a CD drive on the computer 6 In the Update Driver Software window select the option Browse my computer for driver software 7 Click Browse and navigate to the following d...

Page 16: ...button 6 Insert the BenQ LCD Monitor CD ROM into a CD drive on the computer 7 In the Update Driver Software window select the option Browse my computer for driver software 8 Click Browse and navigate...

Page 17: ...talled and you need do nothing further Cancel out of these property windows However if BenQ is not listed as the manufacturer or the correct model is not currently shown you will need to continue with...

Page 18: ...screen test image utility which you can use to check for screen color grayscale and line gradient display 1 Run the test program auto exe from CD ROM You could also use any other image such as the de...

Page 19: ...Mode 4 Mode key For Down Decrease adjustment The key is the hot key for Mode 5 ENTER key Enters sub menus and select items This key is also the hot key for Input 6 Power Turns the power on or off OSD...

Page 20: ...en Full and Aspect The setting will take effect immediately See also Display Mode on page 27 Press the key continually to switch between the 6 modes for the main window including Standard Movie Game P...

Page 21: ...For more information on each menu please refer to the following pages Display menu on page 22 Picture menu on page 24 Picture Advanced menu on page 26 System menu on page 29 There are four main OSD me...

Page 22: ...revious menu press the MENU button DISPLAY MODE Standard Auto Adjustment H Position V Position Pixel Clock Phase 10 12 1 12 ENTER MENU Exit Select Move Item Function Operation Range Auto Adjustment Op...

Page 23: ...l Clock Adjusts the pixel clock frequency timing to synchronize with the analog input video signal Not applicable to a digital input signal See also Picture optimization on page 18 0 to 100 Phase Adju...

Page 24: ...the brightness and press the key to decrease the brightness 0 to 100 Contrast Adjusts the degree of difference between darkness and lightness Press the key to increase the contrast and press the key t...

Page 25: ...s will reduce their respective influence on the color tint of the image e g if you reduce the Blue level the image will gradually take on a yellowish tint If you reduce Green the image will become a m...

Page 26: ...mo Dynamic Contrast Display Mode Color Format 5 Standard OFF YUV ENTER MENU Exit Select Move Item Function Operation Range Picture Mode Selects a picture mode that best suits the type of images shown...

Page 27: ...d to allow aspect ratio s other than 16 9 to be displayed without geometric distortion Overscan Slightly enlarges the input image Use this feature to hide annoying edge noise if present around your im...

Page 28: ...at is RGB D Sub Component from a video device The default Color Format is YUV You might need to manually set the Color Format if colors shown on the monitor screen do not display properly DVI Color Fo...

Page 29: ...ack DVI Move Item Function Operation Range Input Use this to change the input to that appropriate to your video cable connection type Press the or keys to change the settings DVI D sub VGA OSD Setting...

Page 30: ...disabled Press the or keys to change the settings To unlock the OSD controls when the OSD is preset to be locked press and hold the MENU key for 15 seconds to enter the OSD Lock option and make chang...

Page 31: ...D 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 appeara...

Page 32: ...may appear distorted or stretched on the monitor running at its native resolution To have the optimal display performance of each type of input sources you can use the Display Mode function to set a...

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