You can view the signage’s main board and the main board’s
ports after you open the anti-theft plate. See "2.1.2 Ports" for
details.
Use the given key to open the anti-theft plate and lock it after your
viewing.
2.1.2 Ports
Use this button to reinstall the Signage’s Android operating
system when the system crushes or you cannot boot up the
Signage.
1. Contact the after sales to get and uncompress the upgrade
files. Save files such as bootargs.bin, fastboot.bin,
recovery.img and update.zip under the USB drive’s root
directory. Insert the USB driver into the Signage’s USB2.0
port.
2. In the reset hole, hold the button with a needle-like thing.
3. Power your Signage. After 3 seconds, loosen the button and
an interface guiding you to reinstall the Android operating
system is displayed.
4. Follow the guides.