Ericsson Dialog 4223 Professional User Manual page 132

Troubleshooting
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or
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132
Dialog 4225 Vision:
PhoneSet
Select
Up
Press to frame
Press (see display).
The display shows the firmware revision state and
for a few seconds. If there is something wrong, a fault message
appears. Inform your system administrator about the fault
message.
All the key lamps on the phone and connected extra key panels
should be switched on during the self-test to indicate that each key
lamp is OK.
After a few seconds the display is checked (the display is
completely dark). The display is OK when there are no light dot(s) or
line(s). The light frame around the display should be there.
Exit
Press the left most display Menu key to exit (see display).
(However the text is not visible when the display has turned black,
the exit feature is still on that Menu key).
Note: If you do not press
finished after about 30 seconds.
in the top menu (see display).
Local Test Mode
Exit
Dialog 4223 Professional/Dialog 4225 Vision
(see display).
Selftest OK
, the self-test is automatically