Users Manual Chapter 1

8 Thor VM3A Vehicle-Mounted Computer
7. When the computer is attached to external power, the UPS battery is
automatically reconnected.
8. Press the Power button to turn on the computer.
Replace the UPS Battery
The UPS battery in the VM3A is field replaceable. Should the UPS battery fail, it can
easily be replaced to minimize downtime.
Equipment Required
The following equipment is user-supplied:
• Torque tool capable of measuring inch pounds
• #2 Phillips screwdriver bit
Replacement Procedure
1. Place the VM3A on a clean, well-lit surface before performing the UPS battery
replacement.
2. Press and hold the Power button until the options menu appears. Tap Power
Off.
3. Remove the computer from the dock.
4. Disconnect the UPS Battery.
Caution: Before replacing the Thor VM3A front panel, Disconnect the UPS
Battery.