Nortel Networks 822p 用户手册

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Check that the P

Power

 light is green, not flashing, and the 

A/V Mute

 slide is open. Also press the 

A/V Mute 

button on the 

remote control to see if the picture was turned off temporarily.

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If the projector doesn’t turn on, the Operation Lock may be 
enabled. Press and hold the 

Enter

 button on the projector for 

7 seconds to release the lock.

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The projector may be in standby or sleep mode. If the projector 
has not received any signal for 30 minutes, it turns off the lamp to 
conserve the lamp life and save energy. If the P

Power

 light is 

orange, press the P

Power

 button to turn on the projector.

The attached computer may also be in sleep mode or displaying a 
black screen saver. Try pressing a key on the computer.

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If the power was switched off and then on again, wait until the 
P

Power

 light stops flashing and remains orange. Then press the 

P

Power

 button again.

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Check the 

Video Signal

, 

Computer1 Input

, or 

Computer2 

Input 

setting in the Signal menu to make sure it is correct for the 

selected source. See page 54 for more information.

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Messages may have been turned off in the 

Display

 setting of the 

Extended menu. See page 58 for details.

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Adjust the 

Brightness

 setting on the Image menu (see page 53) 

or select 

High

 for the 

Brightness Control

 setting in the Settings 

menu (see page 57).

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With 

Direct Power On

 enabled in the 

Operation

 setting of the 

Extended menu, if you unplug the projector and then plug it right 
back in, you must press the P

Power

 button to turn on the 

projector. See page 58 for details.

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Make sure at least one of the projector’s remote receivers are 
turned on in the Settings menu. See page 56 for details.