HP Z840 Maintenance and Service Guide - Page 105

Screen message, Probable cause, Recommended action, Front USB Not Connected

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Screen message Probable cause Recommended action 518-PCI fan not detected PCI fan missing, disconnected, or defective. 1. Reseat the fan cable. 2. Reseat the fan. 3. Replace the fan. 519-Hard drive fan not detected Hard drive fan missing, disconnected, or 1. Reseat the fan cable. defective. 2. Reseat the fan. 3. Replace the fan. 520-Memory fan (2) not detected Memory fan (2) missing, disconnected, or defective. 1. Reseat the fan cable. 2. Reseat the fan. 3. Replace the fan. 521-Memory fan (3) not detected Memory fan(3) missing, disconnected, or 1. defective. 2. 3. Reseat the fan cable. Reseat the fan. Replace the fan. 522-Memory fan (4) not detected Memory fan(4) missing, disconnected, or 1. defective. 2. 3. Reseat the fan cable. Reseat the fan. Replace the fan. 523-CPU fan (2) not detected Processor fan(2) missing, disconnected, 1. Reseat the fan cable. or defective. 2. Reseat the fan. 3. Replace the fan. 524-Rear chassis fan(2) not detected Rear chassis fan(2) missing, disconnected, or defective. 1. Reseat the fan cable. 2. Reseat the fan. 3. Replace the fan. 525-Front chassis fan(2) not detected Front chassis fan(2) missing, disconnected, or defective. 1. Reseat the fan cable. 2. Reseat the fan. 3. Replace the fan. 526-CPU Liquid Cooling pump Liquid cooling pump on CPU1 is not not detected detected. 1. Reseat the pump cable. 2. Replace the pump. 527-CPU Liquid Cooling pump Liquid cooling pump on CPU2 is not (2) not detected detected. 1. Reseat the pump cable. 2. Replace the pump. 529-Unsupported WiFi Device(s) Detected An unsupported WiFi device has been installed into an internal slot. Remove the unsupported device. 917-Front Audio Not Connected Front Audio mechanism is missing or is not connected. 1. Replace or reconnect the missing front audio mechanism to the system board. 2. Reseat or replace the missing mechanism cable. 918-Front USB Not Connected Front USB mechanism is missing or is not 1. connected. 2. Replace or reconnect the missing Front USB mechanism to the system board. Reseat or replace the missing mechanism cable. 921-Front USB Not Connected Front USB mechanism is missing or is not 1. Replace or reconnect the missing Front USB connected. mechanism to the system board. Diagnostic codes and errors 95

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Screen message
Probable cause
Recommended action
518—PCI fan not detected
PCI fan missing, disconnected, or
defective.
1.
Reseat the fan cable.
2.
Reseat the fan.
3.
Replace the fan.
519—Hard drive fan not
detected
Hard drive fan missing, disconnected, or
defective.
1.
Reseat the fan cable.
2.
Reseat the fan.
3.
Replace the fan.
520—Memory fan (2) not
detected
Memory fan (2) missing, disconnected,
or defective.
1.
Reseat the fan cable.
2.
Reseat the fan.
3.
Replace the fan.
521—Memory fan (3) not
detected
Memory fan(3) missing, disconnected, or
defective.
1.
Reseat the fan cable.
2.
Reseat the fan.
3.
Replace the fan.
522—Memory fan (4) not
detected
Memory fan(4) missing, disconnected, or
defective.
1.
Reseat the fan cable.
2.
Reseat the fan.
3.
Replace the fan.
523—CPU fan (2) not detected
Processor fan(2) missing, disconnected,
or defective.
1.
Reseat the fan cable.
2.
Reseat the fan.
3.
Replace the fan.
524—Rear chassis fan(2) not
detected
Rear chassis fan(2) missing,
disconnected, or defective.
1.
Reseat the fan cable.
2.
Reseat the fan.
3.
Replace the fan.
525—Front chassis fan(2) not
detected
Front chassis fan(2) missing,
disconnected, or defective.
1.
Reseat the fan cable.
2.
Reseat the fan.
3.
Replace the fan.
526—CPU Liquid Cooling pump
not detected
Liquid cooling pump on CPU1 is not
detected.
1.
Reseat the pump cable.
2.
Replace the pump.
527—CPU Liquid Cooling pump
(2) not detected
Liquid cooling pump on CPU2 is not
detected.
1.
Reseat the pump cable.
2.
Replace the pump.
529—Unsupported WiFi
Device(s) Detected
An unsupported WiFi device has been
installed into an internal slot.
Remove the unsupported device.
917—Front Audio Not
Connected
Front Audio mechanism is missing or is
not connected.
1.
Replace or reconnect the missing front audio
mechanism to the system board.
2.
Reseat or replace the missing mechanism cable.
918—Front USB Not Connected
Front USB mechanism is missing or is not
connected.
1.
Replace or reconnect the missing Front USB
mechanism to the system board.
2.
Reseat or replace the missing mechanism cable.
921—Front USB Not Connected
Front USB mechanism is missing or is not
connected.
1.
Replace or reconnect the missing Front USB
mechanism to the system board.
Diagnostic codes and errors
95