HP OmniBook 4150 Notebook PC - Manual (Page 27)

Basic System Test
What is Tested
3-7
Each test listed above is performed only if it is appropriate for your PC
configuration. For example, if your PC does not have a SCSI controller, no SCSI tests
will be done.
Furthermore, a component test will be performed only if the component was
correctly detected in the hardware detection phase. For example, if you have
recently installed an IDE hard disk drive and it was not detected during the
hardware detection phase, the hard disk drive will not be tested. (For more
information about hardware detection, refer to chapter 2.)
Note DiagTools does not test components that have not been detected. However, we
recommend that you continue with the basic system test to verify that the
underlying components are functioning correctly.