Dell 부팅메뉴 - dell butingmenyu

Symptoms

The Latitude E7470 may encounter an issue where the USB boot device doesn't appear in the boot select mode (F12) screen. This article provides steps to troubleshoot and resolve this issue.

USB boot device not showing in the Latitude E7470 F12 boot menu

When entering the F12 boot menu on the Latitude E7470, the USB boot device may not show as an option. This can occur whether the computer is set to UEFI or Legacy boot mode in the BIOS, and if the Enable Legacy Option ROMs is chosen under the Advanced Boot Options.

To troubleshoot the issue, first make sure the USB device is recognized in Windows. If the USB device isn't recognized in Windows, then try the device in the different USB ports on the laptop. You can also test whether the USB ports are functioning correctly by running the Dell Enhanced Pre-Boot System Diagnostics (ePSA) on the laptop. Reference the following guide for more information on how to run the ePSA diagnostics: Resolve Hardware Issues Using ePSA or PSA Diagnostics and Guide to Error Codes.

Install the latest BIOS update to resolve the issue

If the USB device is recognized in Windows, then downloading and installing the latest BIOS update for the Latitude E7470 should resolve the issue. Follow the steps below to download the latest BIOS update:

1. Go to the Dell Support / Drivers & Downloads website for your system.
2. Enter your Service Tag or click the View products link under the Browse for a product section to locate support information for your Latitude E7470.
3. Select the BIOS category from the menu.
4. Information on the current BIOS version will appear. Click the Download link to download the file.
5. Navigate to the location where you downloaded the file, then double-click the file name and follow the onscreen prompts to begin the installation.

Symptoms

Symptom

Owners of a Dell business notebook may report that boot mode cannot be changed from UEFI to Legacy in the Boot Menu. You can enter the Boot Menu by pressing F12 after the system powers on.

Affected systems

Resolution

Solution

Updating the latest BIOS version on the computer will help resolve the issue. To download and install the latest BIOS:

Warning: Dell recommends disconnecting any external devices like external hard disk drives, printers, scanners before updating the BIOS.

Warning: Dell laptops must have the battery installed and charged to at least 10% before you begin the BIOS update. Dell recommends connecting the laptop to AC power before proceeding with the update process.

1. Browse to the Dell Drivers & downloads page:

   • Dell Support Site Product Page

2. Ensure your System Type is selected

3. Select the Operating System

4. Under Category, select BIOS

5. Locate the latest System BIOS

6. Click Download and save the file to your computer

7. Open File Explorer and browse to the location where the downloaded file is saved

8. Double-click the BIOS setup file and follow the on-screen instructions to complete the installation process

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