7CPU UpgradeAdding a CPU CardHP3000/979KS/989KS and HP9000/K250/K260/K360/K370/K380/K450/K460 andK570/K580 Power Supply RemovalPrior to adding CPUs to HP3000/979KS/989KS andHP9000/K250/K260/K370/K380/K450/K460 and K570/K580 systems, the power supply must beremoved (see Figure 1-6). Perform the following steps:Figure 1-6 HP3000/979KS/989KS andHP9000/K250/K260/K360/K370/K380K370/K380/K450/K460/K570/K580Power Supply1. Loosen the six captive screws (item 1) along the top and bottom of the power supply unit.CAUTION The power supply unit weighs 26.5 lbs (12kg). Be careful removing and lifting the unit toavoid damage to the power supply.2. Pull the extractor levers (item 2) out. Using the extractor levers, pull the power supply unit partiallyout of the chassis, then grasp the power supply unit by the handle (item 3) and remove it completely.3. Place the power supply on an anti-static mat while proceeding with the CPU replacement procedure.4. Remove the rear processor slot cover plate, which is now visible.