BenQ RP553K User Manual page 60

56 Troubleshooting
The remote control does
not work
USB Function
• Check for incorrect battery orientation.
• Check for dead batteries.
• Check your distance and angle from the display.
• Check whether remote control is properly being pointed
at the display's remote control sensor window.
• Check for any obstacle between the remote control and
the remote control sensor window.
• Check that the remote control sensor window is not
under strong fluorescent lighting, or in direct sunlight.
• Check for any devices (computer or personal digital
assistant, PDA) nearby that transmit infrared signals which
may cause interference to signal transmission between the
remote control and the display. Turn off the infrared
function of these devices.
When working with the environment of ESD interference,
it is normal that the USB connection will be disconnected.
The users have to restart the USB connection manually.