RB951Ui-2HnD doesn't reset

I need help witk my Mikrotik RB951Ui-2HnD.

I tried to resert manually with the reset button and doesn’t responde, i don’t see it on winbox when i’m connected to ir, also the light on the port where i’m connect doesn’t turn on. The last thing is the light on port number four is constantly on without anything connected.

Thanks for your help. Rgds,
Carlos