Table 4. System board LEDs definition (continued)LED name DescriptionIMM 2 heartbeat LED Indicates the status of the boot process ofthe IMM2.When the server is connected to power thisLED flashes quickly to indicate that theIMM2 code is loading. When the loading iscomplete, the LED stops flashing briefly andthen flashes slowly to indicate that theIMM2 if fully operational and you can pressthe power-control button to start the server.Standby power LED When this LED is flashing, it indicates thatthe server is connected to an ac powersource.When this LED is lit, it indicates that theserver is dc power on.System board error LED System-board has failed.Microprocessor mismatch LED When this LED is lit, it indicates thatmicroprocessor 1 is not installed, or themicroprocessors do not have the same cachesize and type, and clock speed.DIMM error LEDs A memory DIMM has failed or is incorrectlyinstalled.Microprocessor error LED Microprocessor has failed, is missing, or hasbeen incorrectly installed.Light path LED Indicates whether or not the lightpathbutton is functional. If the light path LED islit after pressing the lightpath button, itindicates that the lightpath button isfunctioning properly. By contrast, if thelightpath LED is not lit when pressing thelight path button, it means the lightpathbutton is not functioning properly.PCI riser-card adapter expansion slot connectorsThe following illustration shows the respective expansion slot connectors on thethree different types of PCI riser card assemblies that the server is capable ofsupporting.Note: The specifications of the following slot labeling is defined in the followingformat.PCIe3 x aa (b, c, d, e)where:v aa = Physical connector link widthv b, c, d, e = Negotiable link widthPCI riser-card assembly 1v Type 130 System x3650 M4 BD Type 5466: Installation and Service Guide
