without going too much in details, for future reference, please BE EXTREMELY CAREFUL when you are removing screws from the unit or installing after market items for system's physical modification.
Loss of the warranty seal = Loss of the warranty seal
It is there to validate no intrusion was made to the internal components or modification that may affect the safely sound operation. when the seal is gone, that validation is no longer there to assure no modification was done before the system failed. (more specific to dead asics)
Example: (It is really close to the rear fan and sometimes it is extended on to the rear fan)