NewLine TRUTOUCH UB Series User Manual

43Symptom Possible Cause SolutionThe handwritingcannot be shown orno touch signal isdetected.The color of the pen isthe same as or similar tothe background color.Change the color of the pen.Your hand or otherobjects are on the screenwhen you are writing.You are advised to use the penrather than a finger to write. Holdthe pen as far to the nib as possible.The angle between the pen andscreen needs to be greater than 60degrees. Do not touch the screenwith your sleeve or wrist.Strong light or infraredinterferenceRemove the interference source orchange the using environment.The writing method isincorrect.You are advised to use the penrather than a finger to write. Holdthe pen as far to the nib as possible.The angle between the pen andscreen needs to be greater than 60degrees. Do not touch the screenwith your sleeve or wrist.Not sound is playedand no image isdisplayed.● Check whether the power plug is inserted into the powersocket and whether the screen is powered on.● Check whether the rocker switch on the interactive touchscreen is switched on.● Check whether the Standby button on the remote controlleris pressed.● Check whether the video and audio input cables are connectedcorrectly.● Check whether the screen is switched to the right signal source.● Check the settings on image brightness and contrast.● Check the volume.Image is displayedproperly, but nosound is played.● Check the volume.● Check whether the Mute button on the remote controller ispressed.● Check whether the audio cable between the PC and interactivetouch screen is connected correctly.No image is displayedor the image is blackand white.● Modify the color settings.● Check the color system.The image or soundis interrupted.● Find out the electric appliance that causes the interferenceand move it away from the interactive touch screen.● Do not share the power socket of the screen with the electricappliance that causes interference.