32 | CHAPTER 5 – TROUBLESHOOTING
Troubleshooting Picture Issues
Complete the following steps if your interactive display doesn’t display an image
correctly or any image at all. You can resolve these issues with the computer display
settings, the control panel settings or the wireless remote control (see page23).
For additional troubleshooting suggestions, see the NEC MultiSync S521 User’s
Manual (document 145185).

Adjusting the Screen with the Control Panel

The control panel enables you to turn the LCD monitor on and off, change the input
source, change the volume and more.
The control panel is on the right-hand underside of your interactive display.
For more information on these buttons, see the NEC MultiSync S521 User’s Manual
(document 145185).
Key Button Function if the On-Screen
Menu Is Displayed
Function if the On-Screen
Menu Isn’t Displayed
1EXIT Closes the menu.
2 Down Highlights the option below
the currently highlighted
option.
Opens the on-screen menu.
3 Up Highlights the option above
the currently highlighted
option.
4-Decreases the value of the
currently highlighted option.
Decreases the audio output
level.
5+Increases the value of the
currently highlighted option.
Increases the audio output
level.
6INPUT Selects the value of the
currently highlighted option.
Switches between available
input settings.
7MUTE Turns the audio on and off.
8 Power Turns the power on and off.
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