Assaf's Laws of Replacement Parts
A failed 25¢ part cannot be replaced by a new 25¢ part, but by a sub-assembly whose cost is equal to or greater than that of the device needing the part.
A failed 25¢ part cannot be replaced by a new 25¢ part, but by a sub-assembly whose cost is equal to or greater than that of the device needing the part.