88Removals and Replacements of Machine types 2193, 2194, and 6345BEFORE REMOVING ANY FRU, POWER-OFF THE COMPUTER, UNPLUG ALL POWER CORDS FROM ELECTRICALOUTLETS, THEN DISCONNECT ANY INTERCONNECTING CABLES.ATTENTION: The System board, processors, adapter cards, DIMMs, and upgrade processors can be damaged byelectrostatic discharge. Use an electrostatic discharge (ESD) strap to establish personal grounding. If you don’t have an ESDstrap, establish personal grounding by touching a ground point with one hand before touching the static-sensitive FRUs.The Arrows in the removals and replacements procedures show the direction of movement to remove a field-replaceable unit(FRU), to turn a screw, or the direction to press a tab to release the FRU.Begin all removals by removing the cover (and rear cover, if applicable). When other FRUs must be removed prior toremoving the failing FRU, they are listed at the top of the page. Go to the removal procedure for each FRU listed. Removethe FRU, and then continue with the removal of failing FRU.To replace a FRU, reverse the removal procedure and follow any notes that PERTAIN to replacement.Before disconnecting any cables, note their location and orientation. Reinstall any new FRUs with cabling in their originallocation.
