HP Z230 Workstation - Maintenance and Service Guide

Activity Possible cause Recommended action
System does not power-on
and LEDs are not blinking.
No beeps.
System unable to turn 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 four 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 four seconds.
2. The problem might be on the system board. Contact HP for
assistance.
Press and hold the power button for less than four 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. Unplug cables connected to system board.
c. Plug in AC power.
●
If the power supply fan spins and the BIST LED
illuminates, the power supply is good; replace the
system board.
●
If the power supply fan does not spin or the LED does
not illuminate, replace the power supply.
*
The BIOS option you select controls the blue LED function during these suspend modes.
94 Chapter 4 Diagnostics and troubleshooting