IBM 88631SU - System x3850 - 8863 Installation Manual

Also see for 8863 - eServer xSeries 366: Service guide Service guide Installation guide Problem determination and service guide

Contents

If a problem with a DIMM is detected, light path diagnostics will light thesystem-error LED on the front of the server, indicating that there is a problemand will guide you to the defective DIMM. When this occurs, first identify thedefective DIMM; then, remove and replace the DIMM.The following illustration shows the LEDs on the memory card:Memory Hot-Swap EnabledMemory Port PowerErrorMemory Hot-Swap Enabled LED: When this LED is lit, it indicates thathot-swap memory is enabled.Error LED: When this LED is lit, it indicates that a DIMM or memory card hasfailed.Memory Port Power LED: When this LED is off, it indicates that power isremoved from the port and that you can remove the memory card to replace afailed memory card or DIMM.Installing a memory moduleAttention: Static electricity that is released to internal server components whenthe server is powered-on might cause the server to halt, which could result in theloss of data. To avoid this potential problem, always use an electrostatic-dischargewrist strap or other grounding system when working inside the server with thepower on.Complete the following steps to install additional memory modules:1. Read the safety information beginning on page v and “Installation guidelines” onpage 7.2. If you are not hot-swapping a DIMM, turn off the server and peripheral devices,and disconnect the power cords and all external cables necessary to replacethe device.Attention: When moving the memory card, do not allow it to impact anycomponents or structures inside the server.If you are hot swapping a DIMM, make sure that the Memory Hot-SwapEnabled LED is lit.12 IBM System x3850 Type 8863: Installation Guide