47TroubleshootingTroubleshootingRelated messagesWhen the unit's power is on, messages such as those shown below may bedisplayed. When any such message is displayed on the screen, please respondas described below. If the same message is displayed after the treatment, or if amessage other than the following appears, please contact your dealer or servicecompany.Although these messages will be automatically disappeared around severalminutes, it will be reappeared every time the power is turned on.Message DescriptionNO INPUT IS DETECTEDON ***There is no input signal.Please confirm the signal input connection, and the statusof the signal source.SYNC IS OUT OF RANGEON *** fH *****kHz fV *****HzThe horizontal or vertical frequency of the inputsignal is not within the specified range.Please confirm the specs for this unit or the signal source specs.CHECK THE AIR FLOWThe internal portion temperature is rising.Please turn the power OFF, and allow the unit to cooldown at least 20 minutes. After having confirmed thefollowing items, please turn the power ON again.• Is there blockage of the air passage aperture?• Is the air filter dirty?• Does the peripheral temperature exceed 35°C?• If the same indication is displayed after the treatment,please set the HIGH at the FAN SPEED of the itemSERVICE of the OPTION menu.REMINDER*** HRS PASSED AFTER THELAST FILTER CHECK.FILTER MAINTENANCE IS ESSENTIALTO REMOVE WARNING MESSAGE,RESET FILTER TIMER.SEE MANUAL FURTHER INFO.A note of precaution when cleaning the air filter.Please immediately turn the power OFF, and clean orchange the air filter by referring to the “Air Filter” sectionof this manual. After you have cleaned or changed the airfilter, please be sure to reset the filter timer (40).