Brand: SHARP
Category: Displays
Document Type: Manual
Language: EN
Manual for PN-C703B
Uploaded: Nov. 21, 2025, 7:17 p.m.
Warranty Information
The manual does not explicitly state a warranty period.
Basic Operation
This section covers the fundamental operations of the monitor, including using the remote control and the buttons on the monitor itself. It details how to select input modes, adjust volume, navigate menus, and change screen sizes.
- Input Selection: Press the INPUT button to cycle through available input sources (HDMI1, HDMI2, HDMI3, INPUT4, INPUT5, PC).
- Volume Control: Use the VOL +/- buttons to adjust the audio level or navigate menus.
- Menu Navigation: Press the MENU button to display the on-screen menu for adjustments. Use cursor controls to navigate and ENTER to confirm.
- Screen Size Adjustment: The SIZE/F3 button allows you to select different screen display modes (WIDE, UNDERSCAN, Dot by Dot, NORMAL) to optimize the image for various input signals.
- Power Control: Use the POWER button on the remote control or the monitor to turn the unit on or off, or to put it into standby mode.
Troubleshooting and error codes
| Problem | Possible Cause | Solution |
|---|---|---|
| No picture or sound | Power is off. | Turn the power on. |
| Incorrect input mode selected. | Select the correct input mode. | |
| External equipment not operating. | Ensure connected equipment is operating. | |
| Remote control does not work | Batteries inserted incorrectly. | Check battery polarity (+/-). |
| Batteries exhausted. | Replace batteries. | |
| Not pointing at remote control sensor. | Point at the monitor's remote control sensor. | |
| Remote control operation disabled in FUNCTION menu. | Enable remote control operation in the FUNCTION menu. | |
| Sound from left and right speakers is reversed. Sound is heard from only one side. | Audio cables connected improperly. | Check audio cable connections. |
| Incorrect BALANCE setting in AUDIO SETTINGS. | Adjust the BALANCE setting. | |
| There is a picture but no sound. | Sound is muted. | Unmute the sound. |
| Volume is set to minimum. | Increase the volume. | |
| Audio cables connected properly. | Check audio cable connections. | |
| Incorrect AUDIO OUTPUT setting. | Check the AUDIO OUTPUT setting in the OTHERS menu. | |
| Unstable video. | Incompatible signal. | Check signal compatibility. |
| Automatic screen adjustment needed (for PC input). | Perform automatic screen adjustment. | |
| Video from HDMI input terminal not proper. | HDMI cable not standard compliant. | Use a standard-compliant HDMI cable. |
| Input signal not compatible. | Check signal compatibility. | |
| Video from D-sub input terminal not correct. | Input signal not compatible. | Check signal compatibility. |
| Control buttons do not work. | Interference from outside noises. | Turn power off and on after waiting 5 seconds. |
| Monitor not turned on before computer/playback device. | Turn on the monitor first. | |
| Computer resolution changes automatically. | Various causes (graphic card, cable connection). | Disconnect/reconnect video cable, use DETECT button, reboot computer. |
| Touch panel does not respond. | USB cable not connected properly. | Ensure USB cable is connected properly. |
| USB cable too long. | Use a USB cable with a repeater if extending. | |
| Touch screen response is slow. Some parts of the screen do not respond. | Direct sunlight or strong light. | Avoid direct sunlight or strong light. |
| Obstacle between infrared transmitter/receiver and touch pen/finger. | Ensure clear path. | |
| Infrared transmitter/receiver is dirty. | Gently wipe with a soft cloth. | |
| Small touch tip. | Use a tip larger than approximately 5/16 inch. | |
| Touching panel while computer is starting or USB cable is connected. | Do not touch the panel during these times. | |
| Two touch pens used simultaneously. Touch pens moved near each other. Pen held at an angle. | Avoid these conditions. | |
| Power LED flashes red. | Hardware problem. | Request repair from SHARP dealer. |
| Power LED flashes green. | High temperature inside the monitor. | Remove cause of excessive temperature rise. |
| Monitor makes a cracking sound. | Cabinet expansion/contraction due to temperature changes. | This is normal and does not affect performance. |