Push the black box in the lower right room on the switch (That opens the door between the upper and the lower right room)

 Push the wooden box on the switch in the upper right room (That opens the door between the  lower right and the lower middle room)
 

 

Push the black box from the lower right room to the lower middle room on the switch (That opens the door between the lower and the upper middle room)

 

Push the black box that is in the upper middle room on the upper switch (That opens the door between the upper middle and upper right room.)

  

Push the wooden box from the upper right room to the upper middle room on the remaining switch (That opens the door between the lower left room and the lower middle room.)

 

Push the black box that is in the lower left room on the switch (That opens the door between the upper left room and the upper middle room.)

 

Push the wooden box back in the upper right room on the switch (That opens the door between the lower right and the lower middle room.)

 

Push the black box from the lower middle to the lower right room on the switch (That opens the door between the lower and the upper right room.)

 

Push the wooden box down, next to the black box.

 

Push the black box 2 steps left,

 

the wooden box 3 steps down,

 

the black box 2 steps right,2 steps up

 

the wooden box two steps up on the switch

 

Push the black box up and left on the conveyor belt to block the laser.