HP mt42 Maintenance and Service Guide - Page 74

Diagnostics and troubleshooting, Lights, Wake-on LAN, S5 Maximum Power Savings

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10 Diagnostics and troubleshooting Lights Light Status Power Light Off When the unit is plugged into the wall socket and the power light is off, the unit is powered off. However, the network can trigger a Wake On LAN event in order to perform management functions. Power Light On Displays during boot sequence and while the unit is on. During boot sequence, hardware initialization is processed and startup tests are performed on the following: ● Processor initialization ● Memory detection and initialization ● Video detection and initialization NOTE: If one of the tests fails, the unit will simply stop, but the light will stay on. If the video test fails, the unit beeps. There are no messages sent to video for any of these failed tests. NOTE: After the video is initialized, anything that fails will have an error message. NOTE: RJ-45 Lights - Blinking green indicates network activity, and amber indicates a 100MB speed connection. IDE Light is Off When the unit is powered on and the flash activity light is off, then there is no access to the system flash. IDE Light blinks white Indicates the system is accessing the internal IDE flash. Wake-on LAN Wake-on LAN (WOL) allows a computer to be turned on or resumed from sleep or hibernation state by a network message. You can enable or disable WOL in Computer Setup using the S5 Maximum Power Savings setting. To enable or disable WOL: 1. Turn on or restart the computer. 2. Press either Esc or F10 while the "Press the ESC key for Startup Menu" message is displayed at the bottom of the screen. NOTE: If you do not press Esc or F10 at the appropriate time, you must restart the computer and again press Esc or F10 when the monitor light turns green to access the utility. 3. If you pressed Esc, press F10 to enter Computer Setup. 4. Navigate to Advanced > Built-in Device Options. 5. Under Wake-on LAN, select the appropriate WOL setting. 6. Press F10 to accept any changes. 7. Select Main > Save Changes and Exit. 64 Chapter 10 Diagnostics and troubleshooting

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10
Diagnostics and troubleshooting
Lights
Light
Status
Power Light
Off
When the unit is plugged into the wall socket and the power light is
off,
the unit is powered
off.
However, the network can trigger a Wake On LAN event in order to perform management functions.
Power Light On
Displays during boot sequence and while the unit is on. During boot sequence, hardware initialization is
processed and startup tests are performed on the following:
●
Processor initialization
●
Memory detection and initialization
●
Video detection and initialization
NOTE:
If one of the tests fails, the unit will simply stop, but the light will stay on. If the video test
fails, the unit beeps. There are no messages sent to video for any of these failed tests.
NOTE:
After the video is initialized, anything that fails will have an error message.
NOTE:
RJ-45 Lights – Blinking green indicates network activity, and amber indicates a 100MB speed connection.
IDE Light is
Off
When the unit is powered on and the
flash
activity light is
off,
then there is no access to the system
flash.
IDE Light blinks white
Indicates the system is accessing the internal IDE
flash.
Wake-on LAN
Wake-on LAN (WOL) allows a computer to be turned on or resumed from sleep or hibernation state by a
network message. You can enable or disable WOL in Computer Setup using the
S5 Maximum Power Savings
setting.
To enable or disable WOL:
1.
Turn on or restart the computer.
2.
Press either
Esc
or
F10
while the “Press the ESC key for Startup Menu” message is displayed at the
bottom of the screen.
NOTE:
If you do not press
Esc
or
F10
at the appropriate time, you must restart the computer and again
press
Esc
or
F10
when the monitor light turns green to access the utility.
3.
If you pressed
Esc
, press
F10
to enter Computer Setup.
4.
Navigate to
Advanced > Built-in Device Options
.
5.
Under
Wake-on LAN
, select the appropriate WOL setting.
6.
Press
F10
to accept any changes.
7.
Select
Main
>
Save Changes and Exit
.
64
Chapter 10
Diagnostics and troubleshooting