Acer AL2021 - Manual (Page 9)

9
English
Troubleshooting
Problems Possible Solutions
Power LED is not ON • Check to see if the power switch is in the
ON position.
• Ensure that the Power Cord is connected.
No Picture • Check to see if the power switch is in the
ON position.
• Ensure that the Power Cord is connected.
• Ensure the video cable is securely
connected to the back of the monitor and
the computer.
• Move the mouse or press any key on the
keyboard to bring the monitor out of "active
off" mode.
Picture shows inappropriate colors • See "Color Adjustment" to adjust RGB
color or to select color temperature.
Picture bounces or a wave pattern
is present in the picture • Move or switch off electrical devices that
may be causing interference.
• Inspect the monitor's video cable and ensure
that none of the pins are bent.
Image is not sized or centered
properly • Press select/auto key and the monitor will
automatically optimize the position of your
display.
• See "Position adjustment".
Caution: Do not attempt to service the monitor yourself or open the computer
yourself. Please refer all servicing to qualified service personnel if
the problems cannot be solved in "Troubleshooting" section.