Dell Latitude 5550, Руководство по обслуживанию

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4. Click Drivers & downloads > Find it myself .
5. Select the operating system installed on your computer.
6. Scroll down the page and expand
BIOS .
7. Click Download to download the latest version of the BIOS for your computer.
8. After the download is complete, navigate to the folder where you saved the BIOS update file.
9. Double-click the BIOS update file icon and follow the instructions on the screen.
Flea power release
About this task
Flea power is the residual static electricity that remains on the computer even after it has been powered off and the battery has been
disconnected from the system board. The following procedure provides the instructions on how to release the flea power:
Steps
1. Turn off your computer.
2. Remove the
base cover .
NOTE: The battery must be disconnected from the system board (see Step 3 in removing base cover
3. Press and hold the power button for 15 seconds to drain the flea power.
4. Install the
base cover .
5. Turn on your computer.
WiFi power cycle
About this task
If your computer is unable to access the Internet due to WiFi connectivity issues, a WiFi power cycle procedure may be performed. The
following procedure provides the instructions on how to conduct a WiFi power cycle:
NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device.
Steps
1. Turn off your computer.
2. Turn off the modem.
3. Turn off the wireless router.
4. Wait for 30 seconds.
5. Turn on the wireless router.
6. Turn on the modem.
7. Turn on your computer.
Flashing BIOS (USB key)
Steps
1. Follow the procedure from step 1 to step 7 in " Flashing the BIOS " to download the latest BIOS setup program file.
2. Create a bootable USB drive. For more information see the knowledge base article SLN143196 at www.dell.com/support .
3. Copy the BIOS setup program file to the bootable USB drive.
4. Connect the bootable USB drive to the computer that needs the BIOS update.
5. Restart the computer and press
F12 when the Dell logo is displayed on the screen.
6. Boot to the USB drive from the One Time Boot Menu .
7. Type the BIOS setup program filename and press Enter .
8. The BIOS Update Utility appears. Follow the instructions on the screen to complete the BIOS update.
Troubleshooting 61