Hytera HM68X User Manual page 41

Phenomena
The keys are unavailable.
The LCD does not display
any information.
The GPS cannot locate your
position.
If the above solutions cannot solve your problems, or you may have some other queries, please contact us or your local
dealer for more technical support.
Analysis
The radio may be in an unfavorable position. For
example, the signal may be blocked by tall buildings
or frustrated in the underground areas.
The radio may suffer from external disturbance
(such as electromagnetic interference).
The keypad may not work temporarily.
The LCD may not work temporarily.
The GPS module may be connected improperly.
The radio may be at an unfavorable position, so no
GPS signal is received.
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Solution
Move to an open and flat area, and
then restart the radio.
Stay away from the equipment that
may cause interference.
Restart the radio.
Restart the radio.
Reconnect the GPS module.
Move to an open and flat area, and try
again.