Compaq dx2818 Service Reference Guide: HP Compaq dx2810 and dx2818 Business PC - Page 155

Contacting Customer Support

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Table C-1 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes 8 eight times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. System board failure 1. Reflash the system ROM with the or invalid ROM latest BIOS image. based on bad checksum. 2. Replace the system board. System does not power None on and LEDs are not flashing. System unable to power on. Press and hold the power button for less than 4 seconds. If the hard drive LED turns green, the power button is working correctly. Try the following: 1. Check that the voltage selector (some models), located on the rear of the power supply, is set to the appropriate voltage. Proper voltage setting depends on your region. 2. Replace the system board. OR Press and hold the power button for less than 4 seconds. If the hard drive LED does not turn on green then: 1. Check that the unit is plugged into a working AC outlet. 2. Open hood and check that the power button harness is properly connected to the system board. 3. Check that both power supply cables are properly connected to the system board. Contacting Customer Support For help and service, contact an authorized reseller or dealer. To locate a reseller or dealer near you, visit http://www.hp.com. NOTE: If you take the computer to an authorized reseller, dealer, or service provider for service, remember to provide the setup and power-on passwords if they are set. Refer to the number listed in the warranty or in the Support Telephone Numbers guide for technical assistance. Contacting Customer Support 145

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Activity
Beeps
Possible Cause
Recommended Action
Red Power LED flashes
eight times, once every
second, followed by a
two second pause.
Beeps stop after fifth
iteration but LEDs
continue until problem is
solved.
8
System board failure
or invalid ROM
based on bad
checksum.
1.
Reflash the system ROM with the
latest BIOS image.
2.
Replace the system board.
System does not power
on and LEDs are not
flashing.
None
System unable to
power on.
Press and hold the power button for less
than 4 seconds. If the hard drive LED
turns green, the power button is working
correctly. Try the following:
1.
Check that the voltage selector
(some models), located on the rear
of the power supply, is set to the
appropriate voltage. Proper voltage
setting depends on your region.
2.
Replace the system board.
OR
Press and hold the power button for less
than 4 seconds. If the hard drive LED
does not turn on green then:
1.
Check that the unit is plugged into a
working AC outlet.
2.
Open hood and check that the
power button harness is properly
connected to the system board.
3.
Check that both power supply
cables are properly connected to
the system board.
Contacting Customer Support
For help and service, contact an authorized reseller or dealer. To locate a reseller or dealer near you,
visit
.
NOTE:
If you take the computer to an authorized reseller, dealer, or service provider for service,
remember to provide the setup and power-on passwords if they are set.
Refer to the number listed in the warranty or in the
Support Telephone Numbers
guide for technical
assistance.
Table C-1
Diagnostic Front Panel LEDs and Audible Codes (continued)
Contacting Customer Support
145