Are there 2 screws in the door? At the bottom there are usually 2 screws you remove and then lift the door. To replace the hinges will not stay in the open position by themselves, put a screwdriver on each hinge ( handle side out between hinge and cabinet) let the hinge GENTLY close on the screwdriver. It will hold it in the open position to slide door back on. Replace the screws and done.