System-board LEDsThe following illustration shows the light-emitting diodes (LEDs) on the systemboard.Slot 5, PCI 32-bit 33 MHz LEDSlot 4, PCI 32-bit 33 MHz LEDSlot 3, PCI-X 64-bit 133 MHz LEDSlot 2, PCI Express x4 LEDSlot 1, PCI Express x8 LEDStandby power LEDMicroprocessorfan LED DIMM 1LEDDIMM 2LEDDIMM 3LEDDIMM 4LEDSystem fan LEDHard drivefan LEDMini-PCI slotLEDMicroprocessor LEDBoard VRD fault LEDMini-BMCheartbeat LEDFor more information about the system-board LEDs, see the Problem Determinationand Service Guide on the IBM System x Documentation CD.Installation guidelinesImportant: Before you install optional hardware devices, make sure that the serveris working correctly. Start the server, and make sure that the operating systemstarts, if an operating system is installed, or that a 19990305 error code isdisplayed, indicating that an operating system was not found but the server isotherwise working correctly. If the server is not working correctly, see "SolvingProblems" in the Installation Guide for diagnostic information.Before you install optional devices, read the following information:v Read the safety information that begins on page v, the guidelines in “Workinginside the server with the power on” on page 22, and “Handling static-sensitivedevices” on page 23. This information will help you work safely.v When you install your new server, take the opportunity to download and applythe most recent firmware updates. This step will help to ensure that any knownissues are addressed and that your server is ready to function at maximum levelsof performance. To download firmware updates for your server, complete thefollowing steps.20 System x3200 M2 Types 4367 and 4368: User’s Guide