1. Overview21.1 Failure Analysis OverviewFor any problems with IP8800/S6700, IP8800/S6600, IP8800/S6300, IP8800/S3600, and IP8800/S2400, refer to thismanual.To visually check the system, follow the instructions in "1.2 System and Partial Failure Analysis Overview."To login and check the system, follow the instructions in "1.3 Functional Failure Analysis Overview."