Dell Vostro 3350 (Early 2011) - Manual (Page 89)

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System Board
Removing The System Board
1. Follow the procedures in Before Working On Your Computer .
2. Remove the battery .
3. Remove the memory card .
4. Remove the access panel .
5. Remove the memory .
6. Remove the WLAN card .
7. Remove the optical drive .
8. Remove the hard drive .
9. Remove the keyboard .
10. Remove the WWAN card .
11. Remove the palm rest .
12. Remove the display assembly .
13. Loosen the screws that secures the heat sink to the system board.
14. Disconnect the fan cable that secures the heatsink to the system board.
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