Lenovo ThinkPad E490 User Manual page 67

8. Pivot the hinge upward to the vertical position.
9. Remove the screw that secures the I/O board 1 , and then remove the I/O board 2 .
Install the I/O board
1. Install the new I/O board in place 1 , and then reinstall the screw to secure the I/O board 2 .
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Chapter 6 CRU replacement