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14 ASUS MK221 Series LCD Monitor
3.3 Troubleshooting (FAQ)
Problem Possible Solution
Power LED is not ON
• Press the button to check if the monitor is in
the ON mode.
• Check if the power cord is properly connected to
the monitor and the power outlet.
The power LED lights amber and there is no
screen image
• Check if the monitor and the computer are in the
ON mode.
• Make sure the signal cable is properly connected
the monitor and the computer.
• Inspect the signal cable and make sure none of
the pins are bent.
• Connect the computer with another available
monitor to check if the computer is
properly working.
Screen image is too light or dark • Adjust the Contrast and Brightness settings via
OSD.
Screen image is not centered or sized properly • Press the button for 2–3 seconds to
automatically adjust the image (VGA input only).
• Adjust the H-Position or V-Position settings via
OSD (VGA input only).
Screen image bounces or a wave pattern is
present in the image
• Make sure the signal cable is properly
connected to the monitor and the computer.
• Move away electrical devices that may cause
electrical interference.
Screen image has color defects (white does not
look white)
• Inspect the signal cable and make sure that
none of the pins are bent.
• Perform
All Reset
via OSD.
• Adjust the R/G/B color settings or select the
Color Temperature via OSD.
Screen image is blurry or fuzzy • Press the button for 2–3 seconds to
automatically adjust the image (VGA input only).
• Adjust the Phase and Clock settings via OSD
(VGA input only).
No sound or sound is low • Ensure that thse audio cable is properly
connected to the monitor and the computer
• Adjust the volume settings of both your
monitor and computer.
• Ensure that the computer sound card driver
is properly installed and activated.
Webcam or array microphone is not working • Make sure that you have connected the USB
2.0 cable securely to both the LCD monitor and
your computer.
• Make sure that you use the Microsoft
®
Windows
®
Vista / XP Service Pack 2 operating systems.