Panasonic PT-L750U R Operating Instructions Manual page 69

Problem
The remote control
unit does not operate.
The buttons on the
projector do not
function.
The picture does not
display correctly.
Picture from
computer does not
appear.
B The batteries may be weak.
B The batteries may not be inserted correctly. (Refer to
page 22.)
B The remote control signal receptor on the projector may
be obstructed. (Refer to page 22.)
B The remote control unit may be out of the operation
range. (Refer to page 22.)
B Press and hold the Power button on the remote control
unit or the projector for more than 5 seconds to turn the
power off and back on again. At this time, the projector
will turn on and go to the standby condition.
B The CONTROL KEY may be set to "OFF". (Refer to
page 48.)
In order to set the CONTROL KEY to "ON" without using
the remote control unit, keep holding down the ENTER
button on the projector and press the MENU button for
more than 2 seconds. It will then be turned ON.
B Press and hold the Power button on the remote control
unit or the projector for more than 5 seconds to turn the
power off and back on again. At this time, the projector
will turn on and go to the standby condition.
B The signal format (TV system) may not be set correctly.
(Refer to page 39.)
B There may be a problem with the video tape or other
signal source.
B A signal which is not compatible with the projector may
be being input. (Refer to page 63.)
B If you select SXGA60 or SXGA60+ type RGB signals,
the pictures may not be projected correctly. If this
happens, press the AUTO SETUP button.
B The cable may be too long.
B The external video output for the laptop computer may
not be set correctly.
(You may be able to change the external output settings
by pressing the [Fn]+[F3] or [Fn]+[F10] keys
simultaneously. The actual method varies depending on
the type of computer, so refer to the documentation
provided with your computer for further details.)
B If an RGB input indicator (Refer to page 16) is turned off,
the video signals may not be output from the computer.
B RGB2 SELECT in the OPTION menu is set to OUTPUT
when the signals are input to RGB2 IN / RGB OUT
connector. (Refer to page 46.)
Possible cause
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