HP 280 G1 Specifications download pdf (Page 90)

Table 7-1 Solving Hardware Installation Problems (continued)

A new device is not recognized as part of the system.

Cause Solution

To access Device Manager in Windows 7, click Start, select

Control Panel, and then select Device Manager.

To access Device Manager in Windows 8.1, from the Start screen,

type c, select Control Panel from the list of applications, and then

select Device Manager.

USB ports on the computer are disabled in Computer Setup. Run the Computer Setup utility and ensure that Device available

is selected for appropriate USB ports under Security > USB

Security.

Computer will not start.

Cause Solution

Wrong memory modules were used in the upgrade or memory

modules were installed in the wrong location.

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.

Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps

stop after fifth iteration but LEDs continue flashing.)

Cause Solution

Memory is installed incorrectly or is bad. CAUTION: To avoid damage to the DIMMs or the system board,

you must unplug the computer power cord before attempting to

reseat, install, or remove a DIMM module.

1. Reseat DIMMs. Power on the system.

2. Replace DIMMs one at a time to isolate the faulty module.

NOTE: DIMM1 or XMM1 must always be installed. DIMM1

must be installed before DIMM2, and DIMM3 must be

installed before DIMM4

3. Replace third-party memory with HP memory.

4. Replace the system board.

82 Chapter 7 Troubleshooting without diagnostics

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HP 280 G1 Specifications Page 90