Lenovo ThinkPad E450 (English) Hardware Maintenance Manual - ThinkPad E450, E4 - Page 87
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a b • Do not touch the thermal grease. • Do not press, touch, or rotate the fan impeller. • Do not touch the fan inlet hole. • Do not twist or pull the cable of the thermal fan assembly. • Do not apply pressure on the top and bottom covers of the thermal fan assembly. • Do not press the heat pipe. Hold both sides of the heat pipe if you must take the thermal fan assembly. • Do not shake or drop the thermal fan assembly. • Ensure that the fan connector is attached firmly. • Replace the thermal fan assembly if you observe the following: - The cover of the thermal fan assembly is deformed or damaged. - There is abnormal noise during rotation. When you install the system board: Ensure that all the connectors are attached firmly to the system board. 1130 Battery pack For access, remove this FRU: • "1010 Lenovo OneLink connector cover" on page 64 • "1020 DIMM door" on page 65 • "1030 Internal storage drive" on page 65 • "1040 Memory module" on page 66 • "1050 Wireless LAN card" on page 67 • "1060 Coin-cell battery" on page 68 • "1070 Keyboard" on page 69 • "1080 Keyboard bezel assembly" on page 70 • "1090 Media card reader" on page 72 • "1100 USB/audio card" on page 73 • "1120 System board, dc-in support bracket, and thermal fan assembly" on page 74 Important notices for replacing a battery pack Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use. Chapter 9. Removing or replacing a FRU 81