Dell studio 1555 power button broken problem

Hello everybody; I have dell studio 1555 in my use since last light I accidentally borken its power button cover on right hinge and its inner slodering of three wires with button pcb are broken... as it is micro soldering, I am not been able to solder it and even worsen the case I lost one soldering tip of pcb while removing upper glue. I have important files in my laptop to work on. Kindly help me in which direction I can proceed to fix this problem?