Removing The Heat Sink Assembly - Dell OptiPlex 755 User Manual

3 Select the Chassis Intrusion option and then press the left- or right-arrow key to select Reset. Change
the setting to On, On-Silent, or Disabled.
NOTE:
The default setting is On-Silent.
4 Save your BIOS settings and exit system setup.

Removing the Heat Sink Assembly

1 Loosen the captive screw on each side of the heat sink assembly.
CAUTION:
Despite having a plastic shield, the heat sink assembly may be very hot during normal operation. Be
sure that it has had sufficient time to cool before you touch it.
2 Rotate the heat sink assembly upward, and remove the assembly from the computer.
Lay the heat sink down on its top.
94
Desktop Computer
1 heat sink assembly
2 captive screw housing (2)
1
2