System fans

This workstation includes:

One rear system fan

One CPU heatsink fan

One power supply fan

In addition, an optional front system fan is available for special environments, and some graphics cards include onboard fans.

Resetting the power supply

If an overload triggers the power supply overload protection, power is immediately disconnected.

To reset the power supply:

1.Disconnect the power cord from the workstation.

2.Determine what caused the overload and fix the problem. For troubleshooting information, see Diagnostics and troubleshooting on page 108.

3.Reconnect the power cord and restart the workstation.

When you power off the workstation through the operating system, power consumption falls below what is considered low power consumption but does not reach zero. This low power consumption feature extends the life of the power supply.

10 Chapter 1 Product overview

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HP Z400 H2D81US, VA799UT 799UT#ABA manual System fans, Resetting the power supply