ViewSonic VG712s Service Manual page 41

Step 6. Before executing the firmware program, please test the connection between the monitor and fixtures. Key in "test" after
"Gprobe," and then press "Enter."
If the test result shows "passed," it means the connection is well. If not (failed), it means the connection
has problems. Then you need to check the setup procedure or reboot the PC, or simply use another PC to do
the firmware upgrade.
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