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40
Troubleshooting
Troubleshooting
Problem
Solution
No
picture
Check
the
following
:
• Is
the
display
turned
on
?
Check
the
power
indicator
of
the
display
.
• Is
the
signal
source
device
turned
on
?
Turn
on
the
device
and
try
again
.
• Are
there
any
loose
cable
connections
?
Make
sure
that
all
cables
are
connected
frmly
.
• Have
you
chosen
an
unsupported
output
resolution
on
the
computer
?
Refer
to
Supported
input
signal
resolution
on
page
39
to
select
a
supported
resolution
and
try
again
.
• Have
you
chosen
an
unsupported
output
resolution
on
the
DVD
or
Blu
-
ray
disc
player
?
Refer
to
Supported
input
signal
resolution
on
page
39
to
select
a
supported
resolution
and
try
again
.
No
sound
Check
the
following
:
• Have
you
turned
on
the
mute
function
on
the
display
or
the
input
source
device
?
Turn
off
the
mute
function
or
increase
the
audio
volume
level
and
try
again
.
• Are
there
any
loose
cable
connections
?
Make
sure
that
all
cables
are
connected
frmly
.
The
computer
input
image
looks
strange
• Have
you
chosen
an
unsupported
output
resolution
on
the
computer
?
Refer
to
Supported
input
signal
resolution
on
page
39
to
select
a
supported
resolution
and
try
again
.
• Use
the
Auto
Tune
function
(
See
Picture
menu
on
page
28
)
to
let
the
display
automatically
optimize
the
display
of
computer
image
.
• If
the
result
of
the
Auto
Tune
function
is
not
satisfactory
,
use
the
Phase
,
Horizontal
Pos
.
and
Vertical
Pos
.
functions
to
manually
adjust
the
image
.
The
control
panel
buttons
do
not
work
Have
you
locked
the
control
panel
buttons
?
Unlock
the
buttons
and
try
again
.
Summary of Contents for RP790
Page 1: ...RP790 Interactive Flat Panel User Manual...
Page 35: ...HOME Android system interface 31 ES Files Browser WPS All Apps EZWrite 2 0 EZWrite 2 0 3 4 OK...
Page 42: ...Product information 38 Dimensions RP790 Unit mm...
Page 47: ......
Page 48: ...AC AC AC SPA 30 10 2 2 1 3 3...
Page 54: ......