Lenovo ThinkPad 42X3528 Regulatory Notice page 32

Note: Make sure that the cables are secured as shown in the drawings.
ThinkPad T61 14.1-inch, ThinkPad T61 15.4-inch widescreen, ThinkPad T61 14.1-inch widescreen,
ThinkPad R61 14.1-inch widescreen models
ThinkPad R61 15.4-inch widescreen model
9. Reinstall the keyboard.
10. Reinstall the battery.
11. Turn the computer over again. Connect the ac adapter and cables to the computer; then turn it on.