Recently, several HD1 customers report that their HD1 cant talk to their computer after update the latest firmware. Here I need to say again, Normally if the radio cant power on after upgrade the firmware, please recollect all your previous updating operation if there have something wrong during the process.
1. Double confirm upgrade the correct firmware. GPS radio compatible with GPS firmware.
2. Double confirm enter the DFU mode when updating firmware.
Turn off the radio. Disconnect the cable from the radio and PC.
Connect the cable with HD1, and then enter the DFU mode, then connect the USB cable to PC.
Open the firmware again. Choose com port, Click” Connect”, Update” step by step. It will begin the upgrade process.