1. If upgrade failure appears in the upgrade interface in step 16 above, don't panic, click Exit, unplug the key and USB flash drive for 3 seconds, then turn on the system, press the radio interface, unplug the key and USB flash drive for 3 seconds, and then turn on the computer to upgrade again according to the steps.
2. if NO appears? MAP? Hint? Don't panic,? The map has not been damaged at this time. Wait for 1 seconds. If you haven't entered the upgrade interface, press method 1 to continue.
3. will you be prompted during the upgrade process? "Please don't turn off the power when upgrading", but the progress bar won't move. At this time, don't think that the upgrade has failed, but it is actually upgrading. Wait patiently for more than an hour. Generally, the upgrade is completed in about 1 hour and 2 minutes.