4Installing and removing sled componentsThis section provides information on installing and removing the sled components. For information oninstalling and removing the enclosure components, see the enclosure Owner's Manual at dell.com/poweredgemanuals.Customer and field replaceable unitsThe following components are Customer Replaceable Units (CRUs):• Cooling shroud• PCIe mezzanine card• Internal SD card• SD vFlash card• LAN on Motherboard riser card (LOM)• System Memory• Solid State Drive (SSD)• SSD carrier• SSD blank• SSD backplane• NVRAM backup battery• Processor-and-DIMM blank• Internal Dual SD Module cardThe following components are Field Replaceable Units (FRUs). Removal and installation proceduresshould be performed only by Dell certified service technicians.• Heatsink• Processors• System boardSafety instructionsCAUTION: Many repairs may only be done by a certified service technician. You should onlyperform troubleshooting and simple repairs as authorized in your product documentation, or asdirected by the online or telephone service and support team. Damage due to servicing that isnot authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat came with the product.NOTE: It is recommended that you always use a static mat and static strap while working oncomponents inside the system.34