Table 6-7 Diagnostic lights and audible codes (continued)
Activity Possible cause Recommended action
System does not power-on
and LEDs are not blinking.
No beeps.
System unable to power on.
CAUTION: Internal components might be powered even when the
computer is off. To prevent damage, disconnect the computer power
cord before you remove a component.
To resolve the problem, choose one of the following options:
Press and hold the power button for less than 4 seconds. If the hard disk
drive LED turns green, then:
1.
Remove the expansion cards one at a time and try holding the
power button again for less than 4 seconds.
2.
The problem might be on the system board. Contact HP for
assistance.
Press and hold the power button for less than 4 seconds. If the hard disk
drive LED does not turn on green then:
1.
Check that unit is plugged into a working AC outlet.
2.
Open the access panel and check that the power button harness is
properly connected to the system board.
3. Check that all power supply cables are properly connected to the
system board.
*
The BIOS option you select controls the blue LED function during these suspend modes.
LED color definitions
The following table describes what each LED light on the computer front panel signifies.
Table 6-8 LED color definitions
LED state LED color System status
Solid Blue System is on.
Flashing Blue System is in Standby.
Solid or flashing Red System has experienced an error. (See
POST error
messages on page 167.)
None No light System is in Hibernate, or is off.
166 Chapter 6 Diagnostics and troubleshooting ENWW
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