QVI Cobra DRS-300, User Manual

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Problem Possible Cause Possible Solution
Computer monitor does
not turn on Main power is off Turn on the main power
Monitor is not
connected to the main
power source Connect monitor to the main power
source
Faulty monitor Swap suspected faulty monitor for
known good one; replace monitor if
necessary
Computer monitor turns
on, but the screen is
blank Monitor is not
connected to the
computer Connect the monitor to the computer
Faulty monitor Check if monitor works correctly on
another system; replace if necessary
LCD screen does not
turn on when Cobra is
powered up LCD Screen Power
cable is disconnected Verify that the LCD Screen Power
cable is connected to the back of
Cobra and the top of the camera (see
Figure 2-12)
Faulty LCD screen Swap suspected faulty LCD screen
for known good one; replace LCD
screen if necessary
LCD screen turns on, but
screen is blank LCD screen is not
connected to camera Verify that Video Signal cable is
connected to the top of the camera
and back of the LCD screen (see
Figure 2-13)
Faulty LCD screen Swap suspected faulty LCD screen
for known good one; replace LCD
screen if necessary
Keyboard is not
functional Faulty connection
between keyboard and
computer Check connection between keyboard
and computer
Faulty keyboard Swap known good keyboard for
suspected faulty one; replace if
necessary
6-2 Troubleshooting