Lenovo 20J8 User Manual page 94

Defining a Network Boot sequence
When the computer wakes on LAN, the computer boots from the device as specified on the Network Boot
menu, and then follow the boot order list on the Boot menu.
To define a Network Boot sequence, do the following:
1. Restart the computer. When the logo screen is displayed, press F1 to start the ThinkPad Setup program.
2. Select Startup ➙ Network Boot. The boot device list is displayed.
3. Select a boot device to make it as the top boot priority.
4. Press F10 to save the settings and exit.
You can press F9 to restore to the factory default settings.
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L570 User Guide