Panasonic PT-L720U Projector User Manual


 
53
Others
52
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.
Before calling for service
Before calling for service, check the following points.
Problem Possible cause
Power does not
turn on.
No picture appears.
The picture is
fuzzy.
COLOR is too light or
TINT is poor.
No sound can be
heard.
BThe power cord may not be connected.
BThe MAIN POWER switch is turned off.
BThe main power supply is not being supplied to the
wall outlet.
BTEMP indicator is illuminated or flashing. (Refer to
page 46.)
BLAMP indicator is illuminated or flashing. (Refer to
page 47.)
BThe lamp unit cover has not been securely
installed.
BThe video signal input source may not be
connected properly.
BThe input selection setting may not be correct.
(Refer to page 26.)
BThe BRIGHT adjustment setting may be at the
minimum possible setting. (Refer to page 35.)
BThe shutter function may be in use. (Refer to page
42.)
BThe lens cover may still be attached to the lens.
BThe lens focus may not have been set correctly.
(Refer to page 27.)
BThe projector may not be at the correct distance
from the screen. (Refer to page 25.)
BThe lens may be dirty.
BThe projector may be tilted too much. (Refer to
page 24.)
BCOLOR or TINT adjustment may be incorrect.
(Refer to page 35.)
BThe input source which is connected to the
projector may not be adjusted correctly.
BThe audio signal source may not be connected
properly.
BThe volume adjustment may be at the lowest
possible setting. (Refer to pages 15 and 28.)
BA cable may be connected to the AUDIO OUT
jack.
Problem Possible cause
BThe batteries may be weak.
BThe batteries may not be inserted correctly. (Refer
to page 20.)
BThe remote control signal receptor on the projector
may be obstructed. (Refer to page 20.)
BThe remote control unit may be out of the
operation range. (Refer to page 20.)
BThe CONTROL KEY may be set to “OFF”. (Refer
to page 42)
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.
BThe signal format (TV system) may not be set
correctly. (Refer to page 35.)
BThere may be a problem with the video tape or
other signal source.
BA signal which is not compatible with the projector
may be being input. (Refer to page 56.)
BThe cable may be too long.
BThe 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.)
BIf an RGB input indicator (refer to pages 14 and
17) is turned off, the video signals may not be
output from the computer.
BRGB2 SELECT in the OPTION1 menu is set to
OUTPUT when the signals are input to RGB2 IN /
RGB1 OUT connector. (Refer to page 40)