HP ProDesk 400 G1 Maintenance And Service Manual page 185

Table 8-1 Solving Hardware Installation Problems (continued)
A new device is not recognized as part of the system.
Cause
When the system advised you of changes to the configuration,
you did not accept them.
A plug and play board may not automatically configure when
added if the default configuration conflicts with other devices.
USB ports on the computer are disabled in Computer Setup.
Computer will not start.
Cause
Wrong memory modules were used in the upgrade or
memory modules were installed in the wrong location.
Solution
Reboot the computer and follow the instructions for accepting
the changes.
Use Windows Device Manager to deselect the automatic
settings for the board and choose a basic configuration that
does not cause a resource conflict. You can also use
Computer Setup to reconfigure or disable devices to resolve
the resource conflict.
To access Device Manager in Windows 7, click Start, select
Control Panel, and then select Device Manager.
To access Device Manager in Windows 8, from the Start
screen, type c, select Control Panel from the list of
applications, and then select Device Manager.
Run the Computer Setup utility and ensure that Device
available is selected for appropriate USB ports under
Security > USB Security.
Solution
1. Review the documentation that came with the system to
determine if you are using the correct memory modules
and to verify the proper installation.
NOTE:
DIMM1 or XMM1 must always be installed.
DIMM1 must be installed before DIMM2, and DIMM3
must be installed before DIMM4.
2.
Observe the beeps and LED lights on the front of the
computer. Beeps and flashing LEDs are codes for specific
problems.
3. If you still cannot resolve the issue, contact Customer
Support.
Solving Hardware Installation Problems
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