Chapter 9 Connecting the cables 141BCM200/400 4.0 Installation and Maintenance GuideChecking system power and statusAfter you connect power to the BCM system, the Power LED on the front of the base function trayand expansion unit lights. Once the system services have reactivated, the Power and Status LEDsturn solid green. For further information on LED indicators, see “Viewing the BCM system LEDs”on page 77.LEDs in position 3 to 8 will flash when the SSM is not communicating (during startup, shutdown,or operating system hang).To check system power and status1 If the base function tray Power LED does not light:a Disconnect the power cords.b Check all cables and power connections.c Ensure that the AC outlet has power.d Reconnect the power cords.If the Power LED still does not light, then you have a faulty power supply module. For detailson replacing a power supply module, see “Replacing or upgrading a power supply” on page277.2 If the Power LED is red, then the system generated a critical or major alarm. To resolve analarm condition, see “Resolving alarm conditions” on page 219.3 You are now ready to connect the system to the network and initialize it.When the system power is on, and the system has successfully booted, the Power and Status LEDson the faceplates of the MBM are lit and remain constant. Figure 75 shows an example of an MBMand the LEDs on the MBM faceplate. Table 48 provides a description of the MBM Power andStatus LED states.Note: During system initialization, the system performs diagnostics on the hardwareconfiguration size and installation. If the power fails, system data remains in memory.Note: You can monitor the state of the BCM system LEDs from your computer.
