4. Enclosure fault LED: When this amber LED is lit, it indicates that a system error has occurred in thecompute node. The compute-node error LED will turn off after one of the following events:v Correcting the errorv Reseating the compute node in the IBM Flex System Enterprise Chassisv Cycling the IBM Flex System Enterprise Chassis powerRelated tasks:“Viewing the light path diagnostic LEDs” on page 486After reading the required safety information, look at the control panel to determine whether the LEDsindicate a suboptimal condition or an error.Turning on the compute nodeAfter you connect the compute node to power through the IBM Flex System Enterprise Chassis, you canstart the compute node after the discovery and initialization process is complete.About this taskTo start the compute node, use one of the following methods:Procedurev Start the compute node by pressing the power-control button on the front of the compute node.After you push the power-control button, the power-on LED continues to flash slowly for about 15seconds, and then is lit solidly when the power-on process is complete.Wait until the power-on LED on the compute node flashes slowly before you press the compute nodepower-control button. If the power-on LED is flashing rapidly, the service processor is initializing thecompute node. The power-control button does not respond during initialization.Note: The enhanced service processor can take as long as 3 minutes to initialize after you install thecompute node, at which point the LED begins to flash slowly.v Start the compute node automatically when power is restored after a power failure.If a power failure occurs, the IBM Flex System Enterprise Chassis and then the compute node can startautomatically when power is restored. You must configure the compute node to restart through themanagement module.v Start the compute node remotely using the management module.After you initiate the power-on process, the power-on LED flashes slowly for about 15 seconds, andthen is lit solidly when the power-on process is complete.12 Power Systems: IBM Flex System p260 and p460 Compute Nodes Installation and Service Guide