What to know and how to run them
Dell Diagnostics are traditionally a set of software tools that are included with all Dell Desktops and Laptops. Many times the Dell Support Tech on the telephone will ask a customer to run them and relay any errors that are found. These are handy for diagnosing suspected hardware issues.
Most desktops and laptops have the Dell Diagnostics on a hidden diagnostic partition that you can run if the drive was installed at the factory. This may not work if the hard drive has already been replaced.