I have an 8663A which uses similar but smaller adhesive feet as spacers on the power supply PCB. I believe to simply prevent the solder side of the board from touching the bottom cover.
It uses 3 or 4 of them and one of them (Only one) turned to mush as previously reported by the OP.? The others were seemingly unaffected in this way.? Can¡¯t think of a reasonable explanation in my case.
