LG CineBeam PU700R-GL Owner's Manual page 138

I cannot turn the projector on with the remote control.
• Please make sure your projector power plug is correctly connected to the outlet.
•
Replace the batteries in the remote control. (Use alkaline batteries.)
• Check whether there are any obstacles in front of the projector's remote control
sensor. Sound bars or other obstacles placed in front of the projector's lower
receiver may obstruct IR signal reception.
• When using a set-top box remote control, if the projector integrated control
function of the set-top box remote control is turned off, you cannot power on
or off the projector with the settop box remote control. Please contact your
set-top box provider.
The power turns off suddenly.
• Make sure [Power Off Timer] is set.
•
The projector will be turned off automatically if you do not press any buttons
for 4 hours even after the projector is turned on at the time set by [Power On
Timer].
• There is also a chance that the internal protection circuitry has activated because
the internal temperature of the product has risen unusually or excessively.
• If you are using a set-top box, the projector may be set to turn off when the set-
top box is turned off. To prevent the projector from turning off when you turn off
the set-top box, switch the projector power sync function off on the set-top box.
I cannot turn on or operate the device with the projector remote control even
after setting the universal remote control.
• Make sure that the device's power plug is plugged into the outlet.
•
Replace the batteries in the remote control. (Use alkaline batteries.)
• Check if there are any obstacles blocking the signal in front of the connected
device's remote control receiver.
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