Table 8. DiagnosticsNumber of Power LED flashes Problem description1 System board: BIOS and ROM failure2 No memory or RAM detected3 System board or chipset error4 Memory or RAM failure5 CMOS battery failure6 Video card or chip failure7 CPU failure3,6 BIOS recovery image not found3,7 BIOS recovery image found but invalidFlashing BIOS (USB key)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.Flashing the BIOSYou may need to flash (update) the BIOS when an update is available or when you replace the system board.Follow these steps to flash the BIOS:1 Turn on your computer.2 Go to www.dell.com/support.3 Click Product support, enter the Service Tag of your computer, and then click Submit.NOTE: If you do not have the Service Tag, use the auto-detect feature or manually browse for your computermodel.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.Backup media and recovery optionsDell proposes multiple options for recovering Windows operating system on your Dell PC. For more information. see DellWindows Backup Media and Recovery Options.111