Diagnosis guidelines
If you encounter a problem with the computer, monitor, or software, the following sections provide a list
of general suggestions that help you isolate and focus on the problem before taking further action.
Diagnosis at startup
●
Verify that the computer and monitor are plugged into a working electrical outlet.
●
Remove all diskettes, CDs, or USB drive keys from your system before turning it on.
●
Verify that the computer is turned on and the green power light is on.
●
If you have installed an operating system other than the factory-installed operating system, check
to be sure that it is supported on your system by visiting
http://www.hp.com/go/quickspecs.
●
Verify that the monitor is turned on and the green monitor light is on. Note that not all monitors are
equipped with LED lights to indicate their functionality.
●
Turn up the brightness and contrast controls of the monitor if the monitor is dim.
●
If the computer has multiple video sources and only a single monitor, the monitor must be
connected to the primary display adapter. During startup, the other monitor connectors are
disabled; if the monitor is connected to one of these ports, it will not function after Power-on Self
Test (POST). You can select the default source in Computer Setup (F10).
128 Chapter 6 Diagnostics and troubleshooting ENWW
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