There are 2 main ways that I know of, using the Lifecycle controller which you will see during boot, or installing the RACADM tools from Dell.
To dig into it more, I would start by heading here and reading though all the details: http://www.dell.com/support/article/us/en/04/SLN85572/en#Unique-Hyphenated-Issue-Here-2
This should apply to most modern Dell servers.