GLD 112 Not Booting (White Screen)

Hello,

my church is using GLD 112 digital mixer.

I turned it on today, but the system wouldn’t start.
It just shows white screen with nothing.

I need a solution before tomorrow. Could anyone help me??? :((((

See: https://community.allen-heath.com/forums/topic/gld80-white-screen-no-lights

Most likely the battery.