Lenovo IdeaCentre A730 Hardware Maintenance Manual page 57

Step 8. Remove the scalar shielding and set it aside.
Step 9. Disconnect all the cables from the scalar board.
Step 10. Remove the 5 screws that secure the scalar board to the middle frame and lift it up to remove it.
Step 11. To install the new scalar board:
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Chapter 8 Replacing hardware
51