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Troubleshooting Checklist - HP Z220 SFF Maintenance And Service Manual

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

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