Oven door on this crappy range is not closing properly. Worked fine. Just opened one day and wouldn't close. One hinge seems to sit out further than the other. Have taken door all the way off, but door will not go back on properly, even when following "procedure" in manual. Repairman came out today, said hinge seems to be "sprung", that's all he can see, and he's guessing about $200. What does that mean, a sprung hinge and does the hinge just need to be replaced or the receiver also?