Service Manual

Flashing the BIOS
You 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 computer model.
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.
Flashing 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.
Beep codes
The following table describes the most common beep pattern and their corresponding fault description:
NOTE:
The computer emits a beep sound corresponding to the fault condition shown in the table below. The repeated beep
pattern has a long pause in between the beep codes.
NOTE: To hear the beep codes, connect a speaker to the audio line-out connector on your computer.
Table 17. Beep code patterns
Beep codes Problem description
1 System board: BIOS, ROM failure
2 No memory/RAM detected
3 System board, Chipset error, Clock failure, Gate A20
failure, Super I/O failure, Keyboard controller failure
4 Memory/RAM failure
5 CMOS battery failure
6 Video card/chip failure
7 CPU failure
86 Troubleshooting