HP Model 715/100 hp 9000 series 700 model 715 workstations service handbook (a - Page 127

PCX-T Module (Model 715/75) Before removing the PCX-T module, perform the following steps: S Remove the optional external graphics processor (if installed). S Remove the floor stand. S Open the system unit. Use a Phillips screwdriver to disconnect the internal grounding wire from the heat sink, as shown in Figure 5-42. Move the grounding wire out of the carrier's way. (You may also want to disconnect the grounding wire from the spade lug on the processor board.) Figure 5-42. Disconnecting the PCX-T Grounding Wire CAUTION: If you wish to disconnect the grounding wire from the processor board, press down on the processor board near the spade lug while removing the grounding wire to prevent damage to the surrounding components. Refer to the warning label on the grounding wire. 5-42 Field Replaceable Units