AMX Modero ViewPoint MVP-8400 - Manual (Page 64)

Upgrading MVP Firmware
50 MVP-8400i Modero Viewpoint Wireless Touch Panels
Although firmware upgrades can be done over wireless Ethernet; it is recommended
that firmware KIT files be transferred over a direct USB connection and only when the
panel is connected to a power supply. If battery power or wireless connection fails
during a firmware upgrade, the panel flash file system may become corrupted.