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Article Number: 000186526

OptiPlex 5090, 7090 (Mid Tower or Small Form Factor) and Precision 3450, 3650 Computers with 10th Generation Comet Lake-s Processors Show a 2-4 Blinking Power Led Error

Summary: Information about a 2-4 flashing power button error on the OptiPlex 5090, 7090 (MT or SFF) and Precision 3450, 3650 computers with a 10th Generation Comet Lake-S processor.

This article may have been automatically translated. If you have any feedback regarding its quality, please let us know using the form at the bottom of this page.

Article Content

Symptoms

Power button flashes with 2 amber and 4 white.

Cause

Intel memory training argument.

Resolution

2-4 Flashing Power Button Error

OptiPlex 5090, 7090 (Mid Tower or Small Form Factor) and Precision 3450, 3650 computers with 10th Generation Comet Lake-S processors may show a flashing power button with 2 amber and 4 white. The problem may occur after installing 4 to 16 GB of memory . 

BIOS Update

Do the following steps first:


Updating to the latest BIOS version on the computer will help resolve the issue. To download and install the latest BIOS version:

 
WARNING: Dell recommends disconnecting devices such as external hard drives, printers, scanners, and so on before updating the BIOS.

Dell laptops must have the battery installed and charged to at least 10% before you begin the BIOS update. Dell recommends connecting the laptop to AC power before proceeding with the update process.
 
NOTE: To learn more about updating the BIOS on a Dell computer, see the Dell knowledge base article Dell BIOS Updates.

To install the BIOS, your User account must have Administrator privileges.
 
  1. Browse to Dell.com/Support/Drivers.
  2. Identify your Dell computer.
    1. Click Download & Install SupportAssist to auto-detect your Dell computer. Follow the on-screen instructions to install Dell SupportAssist. For more information, see the Dell knowledge base article: Dell SupportAssist (formerly Dell System Detect): Overview and Common Questions
    2. Enter the Service Tag of the laptop and click Search.
    3. Or, click Browse all products and select your Dell computer from the catalog.
  3. Select the Operating System that is installed on the Dell computer.
  4. Under Category, select BIOS.
  5. Locate the latest System BIOS.
  6. Click Download and save the file to your computer.
  7. Open File Explorer and browse to the location where the downloaded file is saved.
  8. Double-click the BIOS setup file and follow the on-screen instructions to complete the installation process.

Article Properties

Affected Product

OptiPlex 5090 Tower, OptiPlex 5090 Micro, OptiPlex 5090 Small Form Factor, OptiPlex 7090 Tower, OptiPlex 7090 Micro, OptiPlex 7090 Small Form Factor, Precision 3450 Small Form Factor, Precision 3650 Tower

Last Published Date

23 Jan 2024

Version

5

Article Type

Solution

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