Symbol Technologies VC5090 Troubleshooting

8 - 2 VC5090 Vehicle Computer Product Reference Guide
Returning the Vehicle Computer for Service
Troubleshooting
.
NOTE Symbol has taken great care to ensure environmental conditions such as humidity will not affect the
stability of the vehicle computer. This is accomplished my means of desiccant bags which can be inserted
by the user upon receipt of the vehicle computer. In the event, the vehicle computer needs to be shipped
by air carrier to Symbol for repair or maintenance, it is essential that the user remove the desiccant door
cover before the vehicle computer is packaged for shipment. The reason for this step is to avoid
compromising the vehicle computer as a result of pressurization during air transit. The user must simply
remove the screws associated with the desiccant door on the back of the unit. Discard the used desiccant
bags. Upon receipt of the repaired vehicle computer, the user should insert new desiccant bags (if used)
and reseal the doors using new screws.
Table 8-1 Vehicle Computer Problems
Symptom Possible Cause Action
Vehicle computer does
not power on or shuts off
suddenly.
Main power switch on top of vehicle
computer is in the Off position.
Turn the main power switch on.
Power cable not connected properly
or unplugged.
Connect power cable to power cable
portion underside of vehicle computer.
Turn the main power switch on.
If the vehicle computer is powered by
a vehicle battery, the vehicle battery is
depleted.
Replace or charge the vehicle battery.
The power cable ignition sense wire
(yellow) is not connected properly.
Verify that the power cable is connected
properly. See
Connecting the Power
Cable on page 2-10
.
Cannot see characters
on display.
Vehicle computer not powered on or
suspended (Power LED is off).
Press the Power switch on the Quick
Access Panel.
Turn the main power switch on top of the
vehicle computer to the on position.
Screen is too bright/dark. Adjust the brightness; see
Adjusting the
Brightness on page 3-8
.
Display not adjusted properly. Select
Display in the Control Panel
settings and adjust the display.
The vehicle computer is in Suspend
mode (Power LED is off).
Press the Power button on the Quick
Access Panel to turn on the vehicle
computer.