HP Z4 Maintenance and Service Guide - Page 40

Power supply

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Power supply Follow these steps to remove the power supply: 1. Prepare the computer for disassembly (see Preparation for disassembly on page 16), and then remove the following components: a. Access panel (see Access panel on page 20) b. Memory fan (see Memory fan on page 24) c. Rear fan (see Rear fan on page 26) d. System board (see System board on page 30) 2. Remove the four Torx15 M5.0×12.0 screws (1) that secure the power supply to the computer.. 3. Lift the front edge of the power supply (2), and then slide it forward to disengage it from the bottom of the computer chassis. 4. Slide the power supply (3) toward the middle of the computer chassis until it is clear of the computer right edge, and then remove the power supply. To test the power supply: 1. Remove the power supply from the computer. 2. Connect the power cord to the wall outlet. 3. Connect power cord to the power supply. 4. If the power supply fans turn on and the built-in self-test (BIST) light illuminates, the power supply is good and the power supply does not need to be replaced. To install the power supply, slide it into the computer until it latches into place. 32 Chapter 4 Removal and replacement procedures

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Power supply
Follow these steps to remove the power supply:
1.
Prepare the computer for disassembly (see
Preparation for disassembly
on page
16
), and then remove
the following components:
a.
Access panel (see
Access panel
on page
20
)
b.
Memory fan (see
Memory fan
on page
24
)
c.
Rear fan (see
Rear fan
on page
26
)
d.
System board (see
System board
on page
30
)
2.
Remove the four Torx15 M5.0×12.0 screws
(1)
that secure the power supply to the computer..
3.
Lift the front edge of the power supply
(2)
, and then slide it forward to disengage it from the bottom of
the computer chassis.
4.
Slide the power supply
(3)
toward the middle of the computer chassis until it is clear of the computer
right edge, and then remove the power supply.
To test the power supply:
1.
Remove the power supply from the computer.
2.
Connect the power cord to the wall outlet.
3.
Connect power cord to the power supply.
4.
If the power supply fans turn on and the built-in self-test (BIST) light illuminates, the power supply is
good and the power supply does not need to be replaced.
To install the power supply, slide it into the computer until it latches into place.
32
Chapter 4
Removal and replacement procedures