LCD dead after short

[Orenfor]

hi all, i have that issue:
my printer worked fine until in some point the hotend heater connection got disconnected and short the 12V .
after few fixing, (fix the connection, and replace the fuse) everything work fine but the lcd doesn't shoe anything, it have light and all i see is squares,
i'm printing right now, so everything work fine but the LCD (i reloaded clean firmware and it didn't help) .

anyone have suggestion ?
Thanks