Merlin 3070 Service And Maintenance Manual page 102

TROUBLE ON SEVERAL TELEPHONES
Entire System Down
The green Power light on the control unit Power Module is off, but there is no
Symptom:
power failure.
Possible Cause
One or more modules are
1.
inserted improperly.
2. Control unit is defective.
B7-4
Recommended Action
1. Set the Power Module On/Off switch to Off.
Remove and securely replace each module in
the control unit. Set the On/Off switch to On.
2. If the green Power light remains off, replace
the control unit.