Chapter 4. Removing and replacing server componentsReplaceable components are of three types:v Tier 1 customer replaceable unit (CRU): Replacement of Tier 1 CRUs is yourresponsibility. If IBM installs a Tier 1 CRU at your request, you will be charged forthe installation.v Tier 2 customer replaceable unit: You may install a Tier 2 CRU yourself orrequest IBM to install it, at no additional charge, under the type of warrantyservice that is designated for your server.v Field replaceable unit (FRU): FRUs must be installed only by trained servicetechnicians.See Chapter 3, “Parts listing, System x3500 Type 7977,” on page 41to determinewhether a component is a Tier 1 CRU, Tier 2 CRU, or FRU.For information about the terms of the warranty and getting service and assistance,see the Warranty and Support Information document.Installation guidelinesBefore you install optional devices, read the following information:v Read the safety information that begins on page vii and the guidelines in“Handling static-sensitive devices” on page 57. This information will help youwork safely.v Observe good housekeeping in the area where you are working. Place removedcovers and other parts in a safe place.v If you must start the server while the cover is removed, make sure that no one isnear the server and that no tools or other objects have been left inside theserver.v Do not attempt to lift an object that you think is too heavy for you. If you have tolift a heavy object, observe the following precautions:– Make sure that you can stand safely without slipping.– Distribute the weight of the object equally between your feet.– Use a slow lifting force. Never move suddenly or twist when you lift a heavyobject.– To avoid straining the muscles in your back, lift by standing or by pushing upwith your leg muscles.v Make sure that you have an adequate number of properly grounded electricaloutlets for the server, monitor, and other devices.v Back up all important data before you make changes to disk drives.v Have a small flat-blade screwdriver available.v You do not have to turn off the server to install or replace hot-swap powersupplies, hot-swap fans, or hot-plug Universal Serial Bus (USB) devices.v Blue on a component indicates touch points, where you can grip the componentto remove it from or install it in the server, open or close a latch, and so on.v Orange on a component or an orange label on or near a component indicatesthat the component can be hot-swapped, which means that if the server andoperating system support hot-swap capability, you can remove or install thecomponent while the server is running. (Orange can also indicate touch points onhot-swap components.) See the instructions for removing or installing a specific© Copyright IBM Corp. 2007, 2008 55