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200 / Troubleshooting

Modular ICS 4.0 System Coordinator Guide

P0881591 Issue 01

Use a display test if you suspect that one of the indicators on 
the telephone is not working.

1. Press ƒ°‚fi. The display reads Display 

test.

2. Press TEST or ˙ to go ahead with a display test.

3. Adjust the contrast for the telephone display so you are 

able to see the test results clearly. Enter a number to 
change the contrast or press DOWN and UP.

4. Press OK or ˙ to go ahead with the test.

During the test, the display should be filled with solid, dark 
blocks and all the indicators next to the buttons on the 
telephone should be turned on. Any Busy Lamp Field (BLF) 
or CAP modules that are attached to the telephone should be 
completely lit. You lose any information that was showing on 
the BLF before the test started. 

Pressing any button ends the test.

1. Press 

ƒ°‚fi, then £ or NEXT.

2. Press TEST or ˙ to go ahead with a button test.

Ensure that the function of a button matches its 

label by pressing 

ƒ•‚

and then the button to 

see its function.

You can end the telephone testing session anytime by 
pressing 

®

 or 

ƒ

 unless you are testing those 

buttons. The test feature times-out after 30 minutes of no 
activity.

p0881591.book  Page 200  Wednesday, August 19, 1998  6:43 PM