Lenovo ThinkStation P300 (English) User Guide - Small Form Factor - Page 111

systemboard, a. Partially remove screw, thenfullyremovescrew, andthenfullyremovescrew, b. Partially

Page 111 highlights

2. Remove the computer cover. See "Removing the computer cover" on page 74. 3. Lay the computer on its side for easier access to the system board. 4. Locate the heat sink and fan assembly. See "Locating parts on the system board" on page 6. 5. Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system board. See "Locating parts on the system board" on page 6. 6. Follow this sequence to remove the four screws that secure the heat sink and fan assembly to the system board: a. Partially remove screw 1 , then fully remove screw 2 , and then fully remove screw 1 . b. Partially remove screw 3 , then fully remove screw 4 , and then fully remove screw 3 . Note: Carefully remove the four screws from the system board to avoid any possible damage to the system board. The four screws cannot be removed from the heat sink and fan assembly. Figure 48. Screws that secure the heat sink and fan assembly 7. Lift the failing heat sink and fan assembly off the system board. Notes: • You might have to gently twist the heat sink and fan assembly to free it from the microprocessor. • Do not touch the thermal grease while handling the heat sink and fan assembly. 8. Pivot the two plastic retaining clips that secure the heat sink fan duct outward. Then remove the heat sink fan duct from the failing heat sink and fan assembly. Chapter 9. Installing or replacing hardware 99

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2.Removethecomputercover.See“Removingthecomputercover”onpage74.
3.Laythecomputeronitssideforeasieraccesstothesystemboard.
4.Locatetheheatsinkandfanassembly.See“Locatingpartsonthesystemboard”onpage6.
5.Disconnecttheheatsinkandfanassemblycablefromthemicroprocessorfanconnectoronthesystem
board.See“Locatingpartsonthesystemboard”onpage6.
6.Followthissequencetoremovethefourscrewsthatsecuretheheatsinkandfanassemblytothe
systemboard:
a. Partially remove screw
1
,thenfullyremovescrew
2
,andthenfullyremovescrew
1
.
b. Partially remove screw
3
,thenfullyremovescrew
4
,andthenfullyremovescrew
3
.
Note:
Carefullyremovethefourscrewsfromthesystemboardtoavoidanypossibledamagetothe
systemboard.Thefourscrewscannotberemovedfromtheheatsinkandfanassembly.
Figure 48. Screws that secure the heat sink and fan assembly
7.Liftthefailingheatsinkandfanassemblyoffthesystemboard.
Notes:
•Youmighthavetogentlytwisttheheatsinkandfanassemblytofreeitfromthemicroprocessor.
•Donottouchthethermalgreasewhilehandlingtheheatsinkandfanassembly.
8.Pivotthetwoplasticretainingclipsthatsecuretheheatsinkfanductoutward.Thenremovetheheat
sinkfanductfromthefailingheatsinkandfanassembly.
Chapter 9
.
Installing or replacing hardware
99