one would need some sort of magnifier and a trained eye for such. I don't think anyone here, from just your description of the event, is going to know if damage has occurred or not. Damage to a component by a user is never covered by warranty so it would be up to you to negotiate this with the seller. You'll still need to remove the thermal pad. Mineral spirits will usually soften it enough to remove the residue. Goo Gone is basically such.