My experience with oven screen repair was that even if I order all parts that could be the reason for wierd behaviour, it would still be cheaper than call techn

My experience with oven screen repair was that even if I order all parts that could be the reason for wierd behaviour, it would still be cheaper than call technician to come and tell me for sure which part to change. I gotas lucky on first try, but case still stand that sometimes it's just cheaper replace all suspicious parts instead of calling expert to say what's wrong (and call second time for replacement)