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
workstation is off. To prevent damage, disconnect the workstation 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.
4.
Check the power supply functionality
a. Disconnect the AC power.
b. Disconnect
all
internal power supply cables.
c. Plug in the AC power.
If the power supply fan spins and the BIST
**
LED lights, the power
supply is functional. The problem might be on the system board.
Contact HP for assistance.
If the power supply fan does not spin or the BIST
**
LED does not
light, the problem might be in the power supply. Contact HP for
assistance.
*
The BIOS option you select controls the blue LED function during these suspend modes.
**
Some workstation models do not have BIST LED functionality.
LED color definitions
The following table describes what each LED light on the workstation front panel signifies.
Table 6-9
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 169
.)
None
No light
System is in Hibernate, or is off.
Table 6-8
Diagnostic lights and audible codes (continued)
168 Chapter 6 Diagnostics and troubleshooting
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