Hello friend, please do so:
Unplug all the wires from the back of the machine, and then plug in the power cord to try to see if it is caused by other wires? And the machine is turned on and lightly shake the power cord to see if it is a poor contact problem, not on the measurement of the machine fuse and the machine between the negative electrode whether there is a voltage between 10V ~ 15V, the above operation is normal, the same problem, the mandatory upgrading, and the machine is not a good choice.
Methods:
1. Put update.zip into the root directory of the USB flash drive (formatted USB flash drive).
2. Insert the USB flash disk into the USB port of the car.
3. power off the car (unplug the power cord),
4. Ground any one of the KEY square control wires on the rear cable of the car (touch the square control wire to the negative pole of the radio or the metal of the GPS antenna).
5. Plug the car into the power cord and release the square control wire (without grounding) after 15 seconds of start-up time, the car will restart automatically.
6. After reboot, the car will automatically start to upgrade the system, not do any other operation, wait for the upgrade will take about 10 minutes to complete.
The system firmware link:
https://jitu2firmware.oss-eu-central...ile=update.zip