Samsung Printer Blue Power Light is On , But Printer Wont Warm Up?

I was updating my Samsung printer scx 3405w firmware . but in middle my power supply failed . i reconnected the power and on my printer . The power blue light is on , but printer wont wake up or warm up , no display on screen and no switch works . i tried all , disconnected power and again plug but no solution . no switch works also power switch freeze . to off printer need to unplug power cord .

Samsung Printer Blue Power Light is On , But Printer Wont Warm Up?