HP ProDesk 600 G4 Micro Maintenance and Service Guide - Page 76

Troubleshooting without diagnostics, Open Task Manager

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Poor performance. Cause Hard drive fragmented. Program previously accessed did not release reserved memory back to the system. Virus resident on the hard drive. Too many applications running. Some software applications, especially games, are stressful on the graphics subsystem. Cause unknown. Solution Defragment hard drive. Restart the computer. Run virus protection program. 1. Close unnecessary applications to free up memory. 2. Add more memory. 3. Some applications run in the background and can be closed by right-clicking on their corresponding icons in the task tray. To prevent these applications from launching at startup: a. Type msconfig in the taskbar search box, and then select msconfig. b. On the Startup tab of the System Configuration Utility, click Open Task Manager. c. Select applications that you do not want to launch automatically, and the click Disable. 1. Lower the display resolution for the current application or consult the documentation that came with the application for suggestions on how to improve performance by adjusting parameters in the application. 2. Add more memory. 3. Upgrade the graphics solution. Restart the computer. Computer powered off automatically and the Power LED flashes red four times and then white two times. Cause Solution Processor thermal protection activated: A fan may be blocked or not turning. OR The heat sink is not properly attached to the processor. 1. Ensure that the computer air vents are not blocked and the processor cooling fan is running. 2. Open the access panel, press the power button, and see if the processor fan (or other system fan) spins. If the fan does not spin, make sure the fan cable is plugged onto the system board header. 3. If fan a plugged in and not spinning, replace it. System does not power on and the LEDs on the front of the computer are not flashing. Cause Solution System unable to power on. Press and hold the power button for less than 4 seconds. If the hard drive LED turns white, then: 1. If equipped with a voltage selector, check that the voltage selector (located on the rear of the power supply) is set to the appropriate voltage. Proper voltage setting depends on your region. 68 Chapter 6 Troubleshooting without diagnostics

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Poor performance.
Cause
Solution
Hard drive fragmented.
Defragment hard drive.
Program previously accessed did not release reserved memory
back to the system.
Restart the computer.
Virus resident on the hard drive.
Run virus protection program.
Too many applications running.
1.
Close unnecessary applications to free up memory.
2.
Add more memory.
3.
Some applications run in the background and can be closed by
right-clicking on their corresponding icons in the task tray. To
prevent these applications from launching at startup:
a.
Type
msconfig
in the taskbar search box, and then
select
msconfig
.
b.
On the
Startup
tab of the System Configuration Utility,
click
Open Task Manager
.
c.
Select applications that you do not want to launch
automatically, and the click
Disable
.
Some software applications, especially games, are stressful on
the graphics subsystem.
1.
Lower the display resolution for the current application or
consult the documentation that came with the application for
suggestions on how to improve performance by adjusting
parameters in the application.
2.
Add more memory.
3.
Upgrade the graphics solution.
Cause unknown.
Restart the computer.
Computer powered off automatically and the Power LED flashes red four times and then white two times.
Cause
Solution
Processor thermal protection activated:
A fan may be blocked or not turning.
OR
The heat sink is not properly attached to the processor.
1.
Ensure that the computer air vents are not blocked and
the processor cooling fan is running.
2.
Open the access panel, press the power button, and see if
the processor fan (or other system fan) spins. If the fan does
not spin, make sure the fan cable is plugged onto the system
board header.
3.
If fan a plugged in and not spinning, replace it.
System does not power on and the LEDs on the front of the computer are not flashing.
Cause
Solution
System unable to power on.
Press and hold the power button for less than 4 seconds. If the hard
drive LED turns white, then:
1.
If equipped with a voltage selector, check that the voltage
selector (located on the rear of the power supply) is set to
the appropriate voltage. Proper voltage setting depends on
your region.
68
Chapter 6
Troubleshooting without diagnostics