User Guide

3-13
ASUS Portable Monitor MB249C
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 Type-C and HDMI port connected
to source of signal.
• Check if the signal source is ON.
The power LED lights white
and there is no screen image
• Check if the monitor and the computer are in
the ON mode.
• Make sure the USB Type-C and HDMI cable
is properly connected between the Portable
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 Brightness settings via the button.
Screen image bounces or a
wave pattern is present in the
image
• Make sure the USB Type-C and HDMI cable
is properly connected between the Portable
Monitor and the computer.
• Move electrical devices that may cause
electrical interference.
Screen image has color
defects (white does not look
white)
• Inspect the USB Type-C and HDMI cable
and make sure that none of the pins are
bent.