How to Run Hardware Diagnostics on a DELL Latitude 5420 Laptop

Performing a Forced Shutdown

• ⚡ To begin diagnostics, first perform a force shutdown of your DELL Latitude 5420 laptop by pressing and holding the power button until the screen and power light turn off.

Accessing the One-Time Boot Menu

• 🚀 After the forced shutdown, wait 15-20 seconds, then press the power button again and immediately start repeatedly pressing the F12 key.
• 💡 This action will open the one-time boot menu, which provides access to the diagnostics tool.

Running Built-in Diagnostics

• 🎯 From the pre-boot tasks list in the boot menu, select Diagnostics to initiate a quick test.
• ⚠️ Note that the quick test cannot be skipped and must be waited out.
• 🔬 For more detailed testing, you can opt for the advanced test and select specific devices to check.

Reviewing Test Results

• ✅ Upon completion, the system will indicate if all tests passed successfully.
• 🔍 A QR code will be displayed, which can be scanned for more detailed information about the results.
• 📊 System information and logs are also available within the diagnostics menu.

Exiting Diagnostics

• 🚪 Once you have finished reviewing the results or running tests, click the exit button located in the bottom right corner to leave the diagnostics menu.