HP 9020 Service Manual page 156

4-56
Assembly Access
7. Disconnect power supply cable from ac module (Figure 4-58).
8. Disconnect safety ground cable from lug on ac module (Figure 4-58).
9. Loosen four #2 Pozidriv captive screws that attach power supply to computer (Figure 4-58).
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SAFETY GROUND CABLE
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POWER SUPPLY CABLE AC MODULE
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#2 POZIDRIV SCREW
Figure 4-58. Releasing Power Supply Assembly