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Chapter 3
VML750 Troubleshooting Causes and
Indicators
Motorola has made every effort to ensure that this product is of excellent quality. However, if you
experience any problems with the VML750 LTE Vehicular Subscriber Modem (VSM), contact your
Motorola service representative with product-related information. For complete information on ordering
required parts and kits, contact your local customer service representative. See the
section and
FRU/FRE Kit/Part Number Kit
VML750 Troubleshooting
This table gives details regarding possible malfunctions that may occur after first time installation of the
VML750 LTE Vehicular Subscriber Modem (VSM), their probable cause, and the recommended
corrective action. For correct LED indications, See
IMPORTANT: Contact Motorola Solutions Support Center (SSC) team for further
troubleshooting assistance if necessary. For contact information, see the
Table 4 Troubleshooting the VML750
Malfunction
VML750 does not turn
On.
No LAN/Ethernet
connection.
No GPS reception.
Send Feedback
Description.
LED
Probable Cause
Power cable is not
properly connected.
Power button was not
properly pressed.
LAN/Ethernet cable is
not connected, or, Micro
USB cable is not
connected.
GPS cable (from Main
antenna) is not connect-
ed.
VML750 Troubleshooting Causes and Indicators
Indications.
Corrective Action
1 Check the cable connections; connect as
required and turn on the VML750.
2 Verify that the Power LED is blinking
red (standby mode).
3 Press the power button to turn on (expect LED
behavior according to ignition state).
1 Apply power to the modem.
2 Verify that the Power LED is blinking red.
3 Press the Power Button for 2 to 3 seconds.
4 Verify that the Power LED is blinking orange
(in "ignition enabled" mode), or blinking green
and then solid green (in "ignition disabled"
mode).
Connect the LAN/Ethernet cable (See
the LAN/Ethernet
Cable) or the Micro USB cable
(See
Installing the Micro USB
that the LAN LED is green.
1 Connect the GPS cable (See
Antenna
Cables).
6802988C54-D
"Contact
Us"
"Contact
Us" section.
Installing
Cable) and verify
Installing
Table continued...
27
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