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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 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 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. Remove power supply from system chassis. (See
Removing the power
supply on page 80 for details.)
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. For BIST information, see the Maintenance and Service
Guide of the workstation.
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 196.)
None No light System is in Hibernate, or is off.
Table 6-8 Diagnostic lights and audible codes (continued)
ENWW Diagnostic codes and errors 195