Nortel Meridian 1 Manual page 134

Page 130 of 144
Table 21
Troubleshooting M2000 Series Meridian Digital Telephones (Part 2 of 4)
Symptom
Display does not work. (cont.)
There is no response when you
type <CR> or AT at the terminal.
553-3001-215 Standard 12.00 January 2002
Add-on modules
Solution
4
5
6
1
2
3
4
5
6
7
Check that the display ribbon cable is properly
connected to the display board and has not been
pinched.
Ensure that the display board is installed correctly
and held securely with a mounting screw.
M2006, M2008, M2616 – ensure that ADD class of
service is configured in LD 11. See the Software
Input/Output Guide Administration (553-3001-311).
Press the P key and dial 28 to make sure you are in
terminal mode.
Make sure the PC or terminal's has power and is
online.
If the equipment connected to the MCA is not
configured as Data Terminal Equipment, it is
necessary to connect using a null modem cable.
Make sure the MCA is receiving external power.
Check to see that the power cables are connected
properly and the external power supply is running.
If there is a display on the telephone, press the P key
and dial 63 to get into EIA Monitor mode. Be sure the
MCA is receiving signals from the terminal by
watching the display while entering carriage returns
on the keyboard. If the indicator flashes, the
connection is correct. If not, check the cable to make
sure it is the standard RS-232 and is properly
connected.
Press the P key and dial 62 to ensure that the MCA is
in the asynchronous mode. Press the P key and dial
20 to change to the asynchronous mode.
Press the P key and dial * to ensure that the MCA is
in the idle mode.