NorthStar Navigation GM1708 961XD - Manual (Page 43)

SECTION TWO - Installation
961 INSTALLATION MANUAL Revision A Page 33
POWER (cont’d) The control head powers-up, but not the
processor (the processor’s power indicator
at the back of the unit is not lit). • Check the fuse and the power to the
processor.
• Check the coax cable between the
head and the processor.
• Set the TEST-POWER switch on
the processor to the
TEST
position; if
the processor doesn’t power-up, then
power to the processor is faulty, or the
entire unit may be defective.
POWER (cont’d) The control head powers up, beeps, and the
backlight can be operated up and down, but
there isn’t any video. • Verify that the processor’s power indi-
cator at the back of the unit is lit.
• Check the fuse and the power to the
processor.
• Check the coax cable between the
head and the processor and make
sure it’s properly terminated and con-
nected. If a spare known-good cable
is available, temporarily substitute it to
see if the problem goes away.
DISPLAY There is continuous or intermittent system
failure as evidenced by the display screen
flashing a "plaid" or multi-colored "waffle
weave" pattern.
There is continuous or intermittent system
failure as evidenced by the display screen
flashing a pulsing white flash in a continu-
ous repeating pattern.
• Verify that the processor’s power indi-
cator at the back of the unit is lit.
• Check the fuse and the power to the
processor.
• Check the coax cable between the
head and the processor and make
sure it’s properly terminated and con-
nected. If a spare known-good cable
is available, temporarily substitute it to
see if the problem goes away.
• If a test setup with a VGA monitor and
keyboard is available, call Northstar
technical support for guidance con-
cerning in-depth troubleshooting of
the system to determine if the prob-
lem is the display or the processor.
• This may be radar interference; for
additional guidance, see Table 4,
“Troubleshooting the radar interface,”
on page 42.
Table 2: Troubleshooting the installation (continued)
Problem Area Symptom Possible Solutions/Reasons