APM 2.8 STATUS LEDs

Hi,
Anyone please help me, my apm2.8 was working all well, I planned to make final touchups to the physical condition of the copter. When I finished cleaning all the quad, connected the Power module to the board, only the alive(Green) led came on. None other status LEDs initialized.

I tried to connect again but with no success.

I tried to connect to Mission planner also but it didn’t connect.
When I connect radio Tx and Rx LEDs blink. Status LEDs are dead.

Plz help me if anybody can.

Regards