BenQ Bl2420pt User Manual

							  51   Troubleshooting
Need more help?
If your problems remain after checking this manual, please contact your place of purchase or 
e-mail us at: [email protected].
No sound can be heard from the built-in speakers:
• Check whether Line In is properly connected.
• Increase the volume (volume may be muted or too low).
• Remove your headphone and/or external speakers. (If they are connected to the monitor, 
the built-in speakers are automatically muted.)
The light sensor of the monitor does not work well.
The light sensor is located at the front bottom of the monitor. Please check:
• If the Eye Protect function is set to 
ON. Check Ergonomics > Eye Protect.
• If there are any obstacles in front of the sensor that keep the sensor from detecting the light 
properly.
• If there are any objects or clothing in bright colors in front of the sensor. Bright colors 
(especially white and fluorescent colors) reflect light and the sensor cannot detect the main 
light sources.
The ECO sensor of the monitor does not work well.
• The ECO sensor is located at the front bottom of the 
monitor. Check if there are any obstacles in front of the 
sensor that keep the sensor from detecting your presence 
properly.
• The colors and the materials of your clothes may affect the 
detection. Adjust the sensor range if needed. See Sensor 
Range on page 48 for more information.
• Adjust the distance between you and the monitor.
If none of the proceeding actions works, it is probably because the materials of your clothes 
are unique and cannot be detected by the ECO sensor. Please be noted that this is neither a 
manufacturing defect nor is the sensor damaged. You should turn off the ECO sensor for now 
in 
Eco > ECO Sensor.