Dell Latitude XT LED POST Codes Diagnostic Indicators

Created by on July 3, 2014
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How to identify LED Light codes:

When a laptop or computer first powers on, it goes through an initial set of diagnostic tests to make sure vital components are preforming correctly. These tests are called POST or Power On Self Test. When a test fails, the user is notified via POST codes, Light codes, or Beep codes. For diagnosing LED light codes you need to:
  • Power on the laptop or restart it if it is already on.
  • Identify the correct flashing light sequence.
Dell Latitude XT LED Light Codes
LED Light Code Component Causing No POST Possible Solution(s)
Num_Caps_Scroll_Flash1 Motherboard / System Board Fault
  • Replace the motherboard / system board.
Caps_Flash1 RAM Memory Fault
  • Reseat the memory sticks.
  • Replace the memory sticks.
  • Replace the motherboard / system board.
Num_Flash1 CPU Processor Fault
  • Reseat the CPU.
  • Replace the CPU.
  • Replace the motherboard / system board.
Caps_Scroll_Flash1 RAM Not Detected
  • Install the memory sticks.
  • Reseat the memory sticks.
  • Replace the memory sticks.
  • Replace the motherboard / system board.
Num_Caps_NoScroll_Flash1 Option ROM Fault / Keyboard Fault
  • Reseat the ROM device.
  • Replace the ROM device.
  • Replace the motherboard / system board.

Or

  • Reseat the keyboard cable.
  • Replace the keyboard.
Num_Caps_Flash1 Video Card Fault
  • Replace the video card.
  • Replace the motherboard / system board.
Num_NoCaps_Scroll_Flash1 USB Controller Fault
  • Unplug the USB devices.
  • Replace the motherboard / system board.
Num_Scroll_Flash1 LCD Screen Fault
  • Reseat the LCD cable.
  • Replace the LCD screen.
  • Replace the motherboard / system board.
NumOff_CapsOn_ScrollOff_Flash1 Hard Drive / Optical Drive Fault
  • Remove the hard drive and optical drive.
  • Replace the hard drive and test. Then the optical drive and test.
  • Replace the failed component.
  • Replace the motherboard / system board.
NoNum_Caps_Scroll_Flash1 Modem Fault
  • Reseat the modem.
  • Replace the modem.
  • Replace the motherboard / system board.

Topics: Dell Latitude Repair Manuals Dell Laptop Repair Dell Repair Manuals LED POST Codes Latitude XT

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