NEC PlasmaSync 50XM3 Model Information page 108

*1 Overheat protector
If the monitor becomes too hot, the overheat protector will be activated and the monitor will be turned off. If this happens, turn off the power to the monitor
and unplug the power cord. If the room where the monitor is installed is particularly hot, move the monitor to a cooler location and wait for the monitor
to cool for 60 minutes. If the problem persists, contact your dealer.
*2 In the following case, power off the monitor immediately and contact your dealer or authorized Service Center.
The monitor turns off 5 seconds after powering on and then the POWER/STANDBY indicator blinks. It indicates that the power supply circuit, plasma
display panel, temperature sensor, or one or more fans have been damaged.
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