Dell Vostro 3350 (Early 2011) - Manual (Page 51)

Installing The Fingerprint Reader
1. Install the fingerprint reader board and the bracket.
2. Tighten the screws that secure the fingerprint reader bracket.
3. Affix the finger print reader cable to the palm rest.
4. Install the
palm rest .
5. Install the keyboard .
6. Install the hard drive
7. Install the access panel .
8. Install the memory card .
9. Install the battery .
10. Follow the procedures in After Working Inside Your Computer .
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