Acer TravelMate 4220 TravelMate 4520/4220, Extensa 4420/4120 Service Guide - Page 62
Removing the Card Reader Board
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8. Detach the fingerprint board from its bracket. 9. Carefully pry loose the touchpad board from the upper case to detach it. CAUTION: The touchpad board is glued to the upper case. Remove the touchpad board only if it is defective. Removing the Card Reader Board 1. Remove the screws securing the card reader board to the system board. Step 1 Type M2 x L3 BZN+NYLOK Quantity 2 Color Silver Torque 1.6 kgf-cm +/-15% 52 Chapter 3