Dell Inspiron 23 (2350, Mid 2013) - Manual (Page 103)

NOTE: With the computer turned off, press the input source select/
display-off button and the power button simultaneously to initialize
display diagnostics.
The following table describes the OSD for each display settings control:
OSD Display settings control Description
Volume Touch to access the
volume controls menu.
Brightness Touch to access the
brightness controls
menu.
NOTE: Brightness
control feature is
disabled in
Windows 8 charms.
Input source select Touch to switch
between video input
sources.
Up Touch to increase
volume or brightness
levels.
Down Touch to decrease
volume or brightness
levels.
Close Touch to close the OSD
controls.
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