Table 2. System board jumpers (continued)Jumper number Jumper name Jumper settingJP11 TPM initialization jumper v Pins 1 and 2: Normal(default).v Pins 2 and 3: Initiate TPM.JP12 IMM SPI half ROM enable v Pins 1 and 2: Disabled .v Pins 2 and 3: Enable IMMSPI half ROM (default).JP22 Low security_N jumper v Pins 1 and 2: Normal(default).v Pins 2 and 3: Activate lowsecurity.Notes:1. If no jumper is present, the server responds as if the pins are set to 1 and 2.2. Changing the position of the boot block jumper from pins 1 and 2 to pins 2 and 3 beforethe server is turned on alters which flash ROM page is loaded. Do not change thejumper pin position after the server is turned on. This can cause an unpredictableproblem.Important:1. Before you change any switch settings or move any jumpers, turn off the server;then, disconnect all power cords and external cables. Review the information invii, “Installation guidelines” on page 22, “Handling static-sensitive devices” onpage 23, and “Turning off the server” on page 15.2. Any system-board switch or jumper blocks that are not shown in the illustrationsin this document are reserved.System-board LEDsThe following illustration shows the light-emitting diodes (LEDs) on the systemboard.MicroprocessorDIMM 1 SlotDIMM 2 SlotDIMM 3 SlotDIMM 4 SlotIMM HearbeatLEDRTMMHearbeat LEDDIM 1 - 4error LEDsMicroprocessorerror LEDSystem boarderror LEDStandby PowerLEDChapter 2. Installing optional devices 21
