I purchased an open box tv on ebay. The tv has a stand which when when inserted into the base of the tv has 4 screws that hold it in place. The stand is separate from the tv but the 4 screws have been screwed into the back of the tv (in their allotted holes) but they will not come out so the stand can be put in place. They happily spin in the holes and will not come out. All 4 are in place and all 4 are doing the same thing. There must be some way to get them out but I don't know what it is. Can anyone help?