Lenovo ThinkPad X220 Hardware Maintenance Manual page 96

Removal steps of LED board
Step Screw (quantity)
2
M2 × 3.5 mm, wafer-head, nylon-coated (1)
When installing: Make sure that connector
Cabling: When replacing the inverter card or the LED board, route the connector cable as in the following
figure.
90
Hardware Maintenance Manual
1 is attached firmly.
Torque
Color
Silver 0.181 Nm
(1.85 kgfcm)