Now that we’ve explored the BIOS and discussed some of the configuration information it gives us, we want to examine what diagnostics info we get from the BIOS, for example POST.

Built in diagnostics are an important part of computer systems. Every BIOS runs a POST (Power-on Self Test) each time the system boots. It performs basic checks on some core devices to ensure they are installed and operational. Some versions can also include hard drive and memory tests.

At the completion of this lesson, you’ll understand why the BIOS performs diagnostics in the order it does, what happens on a test failure, what the difference is been launch and initialization, what role Memory has in the execution of all the BIOS functions, particularly diagnostics, and finally what information the number of beeps tells us about the status of Windows and BIOS processes.

Learn on the go.
The app designed for the modern cyber security professional.
Get it on Google PlayGet it on the App Store
Practice Labs and Exam Vouchers

Congratulations! You're taking the first step to getting certified. Get some hands on experience with available practice labs OR save some money, support Cybrary, and purchase discounted exam vouchers. Ready to earn your next industry certification? Join cyber security's largest community and start learning today.


Our Revolution

We believe Cyber Security training should be free, for everyone, FOREVER. Everyone, everywhere, deserves the OPPORTUNITY to learn, begin and grow a career in this fascinating field. Therefore, Cybrary is a free community where people, companies and training come together to give everyone the ability to collaborate in an open source way that is revolutionizing the cyber security educational experience.

Cybrary On The Go

Get the Cybrary app for Android for online and offline viewing of our lessons.

Get it on Google Play

Support Cybrary

Donate Here to Get This Month's Donor Badge

Skip to toolbar

We recommend always using caution when following any link

Are you sure you want to continue?