NEC PN-HC751 PN-HC/HE Series Operation Manual - Page 60

An instruction or caution screen is displayed Symptom A caution message is displayed on the screen.*1 Attention ! No Signal Please check input signal or Connection. Out of Range A temperature warning is displayed on the screen. Cause Solution Reference The signal cable may not be connected Connect properly the signal cable to P.22 properly to the input or output terminals the input and output terminals of the of the monitor or the computer. monitor and the computer. The HDMI input may have switched. Set the [CEC] setting under [Setup] -> P.72 [HDMI Settings] to [Off]. The signal cable may be damaged. Check that the signal cable is not damaged. The computer may be turned off. Check that the computer is turned on. The power management function of the computer may be functioning. Move the mouse or press a key on the keyboard. An improper signal may be input to the Change the frequency of the input P.60 monitor. signal or the resolution of the computer. A signal with a resolution higher than Change the frequency of the input P.60 the resolution supported by the monitor signal or the resolution of the may be input. computer. The ambient temperature exceeds the Turn off the power of the monitor since P.73 operation guaranteed temperature. this problem may cause a malfunction. Warning!! The internal temperature is high.
Please check the ambient temperature. *1 Depending on the computer, a proper signal may not be output immediately after changing the resolution or the frequency and the caution may be displayed for a while. In such a case, wait for a while. If the screen display returns to normal, it means the input signal is proper. Others (when connected to a computer) Symptom I cannot change the resolution or the number of colors/The resolution or the number of colors is fixed. Cause Sometimes, the signal cannot be input and output. The driver of the video card may not be correctly recognized by the OS. Solution Restart the monitor and the computer. Reinstall the video card driver. For more information on the reinstallation procedure, refer to the computer manual or the support service for the computer. Others (remote control, speakers) Symptom Cause and solution Reference The remote control is not functioning. The video is displayed but there is no sound. ● The batteries may be flat. ● Check that the batteries are inserted correctly (check the + and - sides). ● The [IR Lock Settings] may be set to [Mode 1] or [Mode 2]. ● Check that the audio cable is correctly connected. Check also that the audio balance is not fully set to one side only. If the balance is set to one side only, set it to the center. ● The sound may be muted. Press the MUTE button on the remote control and check that the sound is output. ● The volume may be set to the minimum. Adjust the volume using the + and buttons on the main unit or the VOLUME button +/- (Volume adjustment) on the remote control. P.7, P.73 P.19, P.20, P.71 57