HP Z840 Maintenance and Service Guide - Page 53

Setting the protection level, Cable lock (optional), Fault notification and recovery

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Setting the protection level To set the Smart Cover Sensor protection level: 1. Turn on or restart the computer. 2. During startup, press and hold the F10 key until you enter Computer Setup (F10) Utility. Press Enter to bypass the title screen, if necessary. NOTE: If you do not press the F10 key at the appropriate time, you must restart the computer, and then press and hold the F10 key again to access Computer Setup (F10) Utility. If you are using a PS/2 keyboard, you might see a keyboard error message. Disregard it. 3. Select Security > Smart Cover > Cover Removal Sensor, and follow the onscreen instructions. 4. Before exiting, select Main > Save Changes and Exit. Cable lock (optional) To prevent theft, you can attach a keyed cable lock to the bottom-left corner of the chassis. This cable lock attaches to the chassis and secures it to the work area. Fault notification and recovery Fault notification and recovery features combine innovative hardware and software technology to prevent the loss of critical data and minimize unplanned downtime. If the computer is connected to a network that is managed by HP CMS, the computer sends a fault notice to the network management application. With HP CMS, you can also remotely schedule diagnostics to run on managed PCs and create a summary report of failed tests. ECC fault prediction When the computer encounters an excessive number of error checking and correcting (ECC) memory errors, it displays a local alert message. This message contains information about the errant DIMM, enabling you to take action before you experience noncorrectable memory errors. ECC DIMMs are standard on this computer. Thermal sensors Several thermal sensors in the HP Workstation regulate computer fans to maintain an acceptable, efficient chassis temperature. Dual-state power button With ACPI enabled, the power button can function as an on/off switch or as a button. This feature does not completely turn off power, but instead causes the computer to enter a low-power standby state. This enables you to go to standby without closing applications, and to return to the same operational state without any data loss. Desktop management 43

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Setting the protection level
To set the Smart Cover Sensor protection level:
1.
Turn on or restart the computer.
2.
During startup, press and hold the
F10
key until you enter Computer Setup (F10) Utility. Press
Enter
to
bypass the title screen, if necessary.
NOTE:
If you do not press the
F10
key at the appropriate time, you must restart the computer, and
then press and hold the
F10
key again to access Computer Setup (F10) Utility.
If you are using a PS/2 keyboard, you might see a keyboard error message. Disregard it.
3.
Select
Security > Smart Cover > Cover Removal Sensor
, and follow the onscreen instructions.
4.
Before exiting, select
Main > Save Changes and Exit
.
Cable lock (optional)
To prevent theft, you can attach a keyed cable lock to the bottom-left corner of the chassis. This cable lock
attaches to the chassis and secures it to the work area.
Fault
notification
and recovery
Fault
notification
and recovery features combine innovative hardware and software technology to prevent the
loss of critical data and minimize unplanned downtime.
If the computer is connected to a network that is managed by HP CMS, the computer sends a fault notice to
the network management application. With HP CMS, you can also remotely schedule diagnostics to run on
managed PCs and create a summary report of failed tests.
ECC fault prediction
When the computer encounters an excessive number of error checking and correcting (ECC) memory errors, it
displays a local alert message. This message contains information about the errant DIMM, enabling you to
take action before you experience noncorrectable memory errors. ECC DIMMs are standard on this computer.
Thermal sensors
Several thermal sensors in the HP Workstation regulate computer fans to maintain an acceptable,
efficient
chassis temperature.
Dual-state power button
With ACPI enabled, the power button can function as an
on/off
switch or as a button. This feature does not
completely turn
off
power, but instead causes the computer to enter a low-power standby state. This enables
you to go to standby without closing applications, and to return to the same operational state without any
data loss.
Desktop management
43