Nortel North American DMS-100 Instruction Manual page 574

TOPS MPX Power-on self-test troubleshooting
TOPS MPX power-on self-test troubleshooting
At your current location
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DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
Continue if a step in a maintenance procedure directs you to this procedure.
The use of this procedure without direction of a maintenance procedure, can
cause equipment damage or service interruption.
After you attempt the power-on self-test and:
If
you do not understand the beeps.
screen is blank plue one beep.
After you attempt the power-on
If
Screen is blank and there are no
beeps.
Screen is bland plus two or more
beeps.
Only the cursor "_" displays.
You cannot read the screen and the
screen is distorted.
Wrong characters display on the
screen.
The internal self-test of the system finds an error with a code that is not 165.
Do
Turn the system off and on again
Check to see:
- If the display power cord plugs into
an electrical outlet that works and
into the system unit.
- If the display is turned on and the
brightness and contrast controls
are turned up.
- If the display signal cable plugs
into the correct connector on the
system unit.
- If the power switch is on.
- If the above items are correct and
screen remains blank, go to step 4.
self test and, (continued)
Do
Check to see:
- If the system unit power cord is
plugged into an electrical outlet
that works and into the system
unit.
- If cables connected to the system
are tight.
- If the power switch is on.
- If the above items are correct and
screen remains blank, go to step 4.
step 4.
step 4.
step 4.
step 4.
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(continued)