Troubleshooting Checklist - HP Z220 SFF Maintenance And Service Manual

Troubleshooting checklist

Before running diagnostic utilities, make sure that.
The computer is connected to a working electrical outlet and powered on, and the power light is
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illuminated.
The monitor (for tower or desktop configurations) is connected to a working electrical outlet and
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powered on, and the power light is illuminated.
The monitor brightness and contrast are properly adjusted.
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The keyboard is operating correctly (press and hold any key and listen for a beep).
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All cables are properly connected.
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All necessary device drivers are installed
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All external media (such as optical disks or USB drive keys) are removed before startup.
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The latest version of BIOS, drivers, and software are installed.
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120 Chapter 4 Diagnostics and troubleshooting