IBM System x3550 M4 Installation And User Manual

Also see for Redboks System x3550 M4: User guide Product guide Installation and service guide Product guide

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IBM System x3550 M4 Installation And User Manual Manual pdf 43 page image

System pulse LEDsThe following LEDs are on the system board and monitor the system power-on andpower-off sequencing and boot progress (see “System-board LEDs” on page 37 forthe location of these LEDs):Table 3. System pulse LEDsLED Description ActionRTMM heartbeat Power-on and power-offsequencing. 1. If the LED blinks at 1Hz, it is functioning properlyand no action is necessary.2. If the LED is not blinking, (trained technician only)replace the system board.IMM2 heartbeat IMM2 heartbeat boot process. The following steps describe the different stages of theIMM2 heartbeat sequencing process.1. When this LED is blinking fast (approximately 4Hz),this indicates, that the IMM2 code is in the loadingprocess.2. When this LED goes off momentarily, this indicatesthat the IMM2 code has loaded completely.3. When this LED goes off momentarily and thenstarts blinking slowing (approximately 1Hz), thisindicates that IMM2 is fully operational. You cannow press the power-control button to power-on theserver.4. If this LED does not blink within 30 seconds ofconnecting a power source to the server, (trainedtechnician only) Replace the system board.Server power featuresWhen the server is connected to an ac power source but is not turned on, theoperating system does not run, and all core logic except for the integratedmanagement module II (IMM2) is shut down; however, the server can respond torequests from IMM2, such as a remote request to turn on the server. The power-onLED flashes to indicate that the server is connected to an ac power source but isnot turned on.Turning on the serverApproximately 5 seconds after the server is connected to power, one or more fansmight start running to provide cooling while the server is connected to power andthe power-on button LED will blink quickly. Approximately 5 to 10 seconds after theserver is connected to power, the power-control button becomes active (thepower-on LED will blink slowly), and one or more fans might start running to providecooling while the server is connected to power. You can turn on the server bypressing the power-control button.The server can also be turned on in any of the following ways:v If a power failure occurs while the server is turned on, the server will restartautomatically when power is restored.v If your operating system supports the Wake on LAN feature, the Wake on LANfeature can turn on the server.Notes:1. When 4 GB or more of memory (physical or logical) is installed, some memoryis reserved for various system resources and is unavailable to the operatingChapter 1. The System x3550 M4 server 27