Dell Latitude 7310, Service Manual

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Table 4. LED codes (continued)
Diagnostic light codes Problem description Recommended solution
1,6 Embedded controller failure Disconnect all power source (AC, battery, coin cell) and
drain flea power by pressing & holding down power
button.
2,1 CPU failure
Run the Intel CPU diagnostics tools, if the problem still
persists, replace the system board.
2,2 System board: BIOS or ROM (Read-Only
Memory) failure Flash latest BIOS version, If problem persists, replace the
system board
2,3 No memory or RAM (Random-Access
Memory) detected Confirm that the memory module is installed properly If
problem persists, replace the memory module
2,4 Memory or RAM (Random-Access Memory)
failure Reset the memory module If problem persists, replace the
memory module
2,5 Invalid memory installed Reset the memory module, If problem persists, replace the
memory module
2,6 System-board or chipset error Flash latest BIOS version If problem persists, replace the
system board
2,7 Display failure Flash latest BIOS version If problem persists, replace the
LCD module
2,8 LCD power rail failure. Replace system board Replace the system board
3,1 Coinless Main battery and adapter plug in
3,2 PCI, video card/chip failure Replace the system board
3,3 Recovery image not found Flash latest BIOS version If problem persists, replace the
system board
3,4 Recovery image found but invalid Flash latest BIOS version If problem persists, replace the
system board
3,5 Power-rail failure Replace the system board
3,6 System BIOS Flash incomplete Replace the system board
3,7 Management Engine (ME) error Replace the system board
Camera status light: Indicates whether the camera is in use.
• Solid white — Camera is in use.
• Off — Camera is not in use.
Caps Lock status light: Indicates whether Caps Lock is enabled or disabled.
• Solid white — Caps Lock enabled.
• Off — Caps Lock disabled.
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 .
Troubleshooting 57