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are these chips couveture or toll house chips? if they are toll house chips chances are they have shortening in them and tempering may not work, couveture should be seeded to temper by adding a portion of unmelted, solid chocolate to the chocolate before tempering. this may bring a normal level of temp to temper. dig?
overheating melts the sugar and fats at too high a temp causing them to purhaps refuse to resolidify. adding a portion of untempered or tempered at factory will bring back a balance of fat and sugar willing to resolidify.
have fun.
if the chocolate will not temper, add cream and make ganach! or use as an ingredient in a cake or icing or ice cream.
unless totally burnt, never waste chocolate!