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Solving Power Supply Problems; Testing Power Supply - HP Z600 Maintenance And Service Manual

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Table 6-1
Minor problems (continued)
Problem

Solving power supply problems

This section presents power supply troubleshooting scenarios.

Testing power supply

Before replacing the power supply, use the Built-In Self-Test (BIST) feature to learn if the power supply
still works.
160 Chapter 6 Diagnostics and troubleshooting
Cause
Possible Solution
a.
Disconnect AC power to the workstation.
b.
Remove a device.
c.
Reconnect AC power and power on the
workstation.
2.
Repeat this process until the faulty device is identified.
Remove the graphics card last. Replace the faulty
device.
3.
If no faulty device is found, replace the system board.
OR
1.
Press and hold the power button for less than four
seconds. If the hard drive LED does not illuminate, then
perform the following tasks:
a.
Verify that the workstation is plugged into a
working AC outlet.
b.
Verify that the power button harness is connected
to the inline front panel I/O device assembly
connector.
2.
Verify that the power supply cables are connected to
the system board.
3.
Verify power supply functionality:
a.
Disconnect the AC power.
b.
Remove the power supply.
c.
Reconnect the AC power.
If the power supply fan spins and the BIST
LED illuminates (see
on page
160), the power supply is good.
Replace the system board.
If the power supply fan does not spin or the
LED does not illuminate (see
supply on page
supply.
Testing power supply
Testing power
160), replace the power
ENWW

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