Manual for M981

Manual for M981

Brand: NEC

Category: Monitor

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 7:49 p.m.

Power ON and OFF Modes

Press the ⏻ button on the Control Panel or POWER ON button on the remote control to turn on the monitor. The monitor's power LED indicates the current status of the monitor. Please refer to the following table for information about the power indicator.
Power indicator status and lighting pattern
Condition Recovery
Glowing blue Normal 1. Turn on the monitor by the remote control or the monitor button.
2. Send an AV signal input to the monitor.
Blinking green*1 Under any of the conditions below, no input signal has been detected by the monitor during the period of time you set:
• The monitor is using an Option Board*2. • [USB POWER] is set to [ON].
• [SLOT POWER] is set to [ON].
• [POWER CONTROL LINK] of [CEC] is set to [ENABLE].
• [DisplayPort VERSION] is set to [1.2 MST] or [1.4 MST].
• [QUICK START] is [ENABLE].
Glowing amber No AV signal input has been detected by the monitor during the period of time you set. (with network signal input)
Blinking amber No AV signal input has been detected by the monitor during the period of time you set. (no network signal input)
Glowing red Turn off the monitor by the remote control or the monitor button. Turn on the monitor by the remote control or the monitor button.
*1 : Time setting for auto power save is available at [POWER SAVE SETTINGS] (See page 101).
*2 : [SLOT POWER] is [ON] or [AUTO]. NOTE: • The blue power indicator that the monitor is powered on and functioning normally can be turned off in the monitor’s OSD menu options. See page 106.
• If the indicator is blinking red in a combination of long and short durations, a certain failure might have occurred. Please contact your supplier.
The Main Power switch must be in the ON position in order to power up the monitor using the POWER ON button on the remote control or the ⏻ button on the Control Panel.

Troubleshooting and error codes

Error number * ErrorCode Alert mail Message Explanation Measure
70h ~ 7Fh The monitor’s power supply is not functioning normally. Standby power abnormal. Please contact your supplier.
80h ~ 8Fh The cooling fan has stopped. Cooling fan abnormal. Please contact your supplier.
90h ~ 9Fh The monitor’s backlight unit is not functioning normally. Backlight abnormal. Please contact your supplier.
A0h ~ AFh The monitor is overheated. Temperature abnormal. Please contact your supplier.
B0h ~ BFh The monitor does not receive an input signal. No signal. Please check “No picture” in “Troubleshooting”.
D0h The remaining capacity of the error log decreased. The Proof of Play log memory size is 1 more hour. Please get a log by using PD external command. See page 74.
D1h The battery for clocks is empty. The battery is empty. Please connect the monitor to the power then recharge the battery. Please set (DATE & TIME) in OSD.
E0h ~ EFh A system error occurred in the monitor. System error. Please contact your supplier.
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