Dell XPS 15z (L511Z) Beep Codes Diagnostic Indicators


How to identify beep 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 Beep codes you need to:
  • Power on the laptop or restart it if it is already on.
  • Listen to the number of consecutive beeps when the computer begins to boot. Restarting the laptop may be necessary and should not harm the laptop at this time.
Dell XPS 15z (L511Z) Beep Codes
# of Beeps Description Possible Cause(s)
1 BIOS ROM checksum in progress or failure System board failure, covers BIOS corruption or ROM errors.
2 No Memory (RAM) detected Memory or Memory slot failure
3
  • chipset Error (North and South bridge error, DMA/IMR/Timer error)
  • Time-Of-Day Clock test failure
  • Gate A20 failure
  • Super I/O chip failure
  • Keyboard controller test failure
System board failure
4 Memory read / write failure Memory failure
5 Real Time Clock (RTC) power fail CMOS battery failure
6 Video BIOS test failure Video subsystem failure
7 CPU Cache test failure Processor failure or motherboard failure
8 LCD LCD failure

Most Common Fixes:

  • 1 Beep: Replace the motherboard / system board.
  • 2 Beeps: Reseat the memory or replace the memory.
  • 3 Beeps: Replace the motherboard / system board.
  • 4 Beeps: Reseat the memory or replace the memory.
  • 5 Beeps: Replace the CMOS battery.
  • 6 Beeps: Reseat or replace the video card or replace the motherboard / system board.
  • 7 Beeps: Reseat or replace the CPU or replace the motherboard.
  • 8 Beeps: Reseat the LCD cable or replace the LCD screen.

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XPS 15z L511z Beep Codes

Topics: Dell Laptop Repair Dell Repair Manuals Beep Codes XPS 15z (L511z)

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2 Responses to Dell XPS 15z (L511Z) Beep Codes Diagnostic Indicators

  1. dorna

    hi i have xps z15 laptop and it beeps on keypress
    i press shift 5 times and press yes any time i have even went to All Control Panel ItemsEase of Access CenterSet up Filter Keys and disabeled the keypress sound but it beeps any 1minute seconds and i have to do the shift thing again please help

  2. Stephen Studio

    Thanks for the error codes. I had a hunch the motherboard was dying when it took a minute or so to boot.

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