North Star GPS/WASS CHART NAGIVATOR GM9571M User Manual

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957 INSTALLATION MANUAL, Revision C1
Page 55
SECTION SEVEN: 
Troubleshooting 
and servicing the 
957 system
Troubleshooting 
957 installation 
problems
Typical problems that may occur during or after the 957’s 
installation are described in the tables below.
Table 10: Troubleshooting the 957 installation
Problem Area
Symptom
Possible Solutions/Reasons
POWER
DISPLAY
Pressing the
 PWR
 key doesn’t start the
957
The 957 powers up, beeps, but there
isn’t any video.
Check the fuse and the power to the 
957.
The display may have failed. Call your 
Northstar dealer or the Northstar 
Service Department.