Patent ID: 8456574

Claim:
An apparatus for storing and retrieving original factory service mode data in a television set, comprising: (a) a working memory operably coupled to a set microprocessor and initially containing the original factory service mode data that is normally accessible by the television set; (b) a reserved memory containing the same original factory service mode data that is normally not accessible to a user and is only accessible by the set microprocessor on a read only basis upon execution of a specific access operation so that the original factory service mode data is copied to the working memory to restore the working memory to an initial condition; (c) the set microprocessor operable to: (i) normally access the original factory service mode data in the working memory; (ii) determine whether the original factory service mode data in the working memory has become corrupted; (iii) responsive to the determination that the original factory service mode data in the working memory has not become corrupted, return to step (i); (iv) responsive to the determination that the original factory service mode data in the working memory has become corrupted, read the original factory service mode data from the reserved memory and copy said original factory service mode data read from the reserve memory into the working memory; and (v) return to step (i); and (d) a control system operably coupled to the set microprocessor to actuate the set microprocessor to perform the specific access operation to access the reserved memory and copy the original factory service mode data from the reserved memory to the working memory when the original factory service mode data in the working memory is determined to be corrupted, wherein the original factory service mode data is only accessible by the set microprocessor on a read only basis upon execution of the specific access operation.