HP Compaq 6000 Pro SFF User Manual page 18

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Press and hold any key. If the system beeps, then the keyboard should
be operating correctly.
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Check all cable connections for loose connections or incorrect
connections.
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Wake the computer by pressing any key on the keyboard or pressing
the power button. If the system remains in suspend mode, shut down
the computer by pressing and holding the power button for at least four
seconds. Then press the power button again to restart the computer.
If the system will not shut down, unplug the power cord, wait a few
seconds, then plug it in again. The computer will restart if automatic
start on power loss is set in Computer Setup. If it does not restart, press
the power button to start the computer.
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Reconfigure your computer after installing a non–plug and play
expansion board or other option.
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Be sure that all the needed device drivers have been installed. For
example, if you are using a printer, you need a driver for that model
printer.
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Remove all bootable media (diskette, CD, or USB device) from the
system before turning it on.
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If you have installed an operating system other than the factory-
installed operating system, check to be sure that it is supported on the
system.
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If the system has multiple video sources (embedded, PCI, or PCI-
Express adapters) installed (embedded video on some models only)
and a single monitor, the monitor must be plugged into the monitor
connector on the source selected as the primary VGA adapter. During
boot, the other monitor connectors are disabled and if the monitor is
connected into these ports, the monitor will not function. You can select
which source will be the default VGA source in Computer Setup.
CAUTION:
is always voltage applied to the system board. You must disconnect the
power cord from the power source before opening the computer to prevent
system board or component damage.
10 Quick Setup & Getting Started
When the computer is plugged into an AC power source, there
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