Lenovo ThinkPad Edge E520 (English) User Guide - Page 140
Startup menu items, Boot Device List F12 Option
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Startup menu items Table 6. Startup menu items Menu item Boot Network Boot UEFI/Legacy Boot UEFI/Legacy Boot Priority Boot Mode Option Keys Display Boot Device List F12 Option Boot Order Lock Selection • Both • UEFI Only • Legacy Only • UEFI First • Legacy First • Quick • Diagnostics Note: You can also enter the "Diagnostic" mode by pressing Esc during POST. • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled Comments Refer to "Startup menu" on page 115. Refer to "Startup menu" on page 115. Enable the UEFI/Legacy boot. Select priority of boot option between UEFI and Legacy. Screen during POST: • Quick: ThinkPad Logo screen is displayed. • Diagnostics: Test messages are displayed. Beep at POST completion: • Quick: No. Sound on error case only. • Diagnostics: Yes. Always sounds. "Ctrl-S" prompt for on-board Ethernet: • Quick: No. • Diagnostics: Yes. Memory testing during POST: • Quick: Quick test (or no test). • Diagnostics: Full test. Testing other devices during POST: • Quick: Minimum test (or no test). • Diagnostics: Can perform necessary testing for critical devices. If you select "Disabled", then "To interrupt normal startup, press Enter" message is not displayed during POST. If you select "Enabled", the F12 key is recognized and the Boot Menu is displayed. If you select "Enabled", the Boot Priority Order is locked for your future use. 122 User Guide