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HP Z240 Maintenance and Service Guide - Page 79

Solving display problems

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Solving display problems These suggestions apply to monitors connected to desktop and tower configurations, and to external monitors connected to all-in-one configurations. Problem Cause Solution Blank screen (no video). The cable connections are not correct. Verify the cable connections from the monitor to the computer and to a working electrical outlet. The monitor is off. Turn the monitor on (LED is on). You might need to refer to the monitor manual for an explanation of LED signals. Screen blanking utility installed or energy saver features enabled. Press a key or the mouse button and, if set, enter your password. System ROM is bad; system is running in FailSafe Boot Block mode (indicated by 8 beeps). Reflash the ROM using a SoftPaq. Fixed-sync monitor does not Verify that the monitor can accept the same horizontal scan sync at the resolution specified. rate as the resolution specified. Computer is in Hibernate mode. Press the power button to resume from Hibernate mode. Workstation monitor settings are not compatible with the monitor. 1. When you see Press f8 in the bottom-right corner of the screen, restart the computer and press f8 during startup. 2. Using the keyboard arrow keys, select Enable VGA Mode, and then press enter. 3. For Windows, double-click the Display icon in the Control Panel and then select the Settings tab. 4. Use the sliding control to reset the resolution. The display works properly during the POST but goes blank when the operating system starts. The display settings in the 1. For Windows, restart your computer in VGA mode. operating system are incompatible with your graphics 2. After the operating system starts, change the display card and monitor. settings to match those supported by your graphics card and monitor. 3. Refer to your operating system and graphics card documentation for information about changing display settings. Power LED flashes red 6 times (once every second), followed by a twosecond pause, and then the computer beeps 6 times. Pre-video graphics error. For systems with a graphics card: 1. Reseat the graphics card. 2. If the card requires external power, make sure the power cable is properly connected. 3. Replace the graphics card. 4. Replace the system board. For systems with no graphics card installed, the CPU may have no integrated graphics capability. Monitor does not function when used Monitor without Energy Saver with Energy Saver features. capabilities is being used with Energy Saver features enabled. Disable the monitor Energy Saver feature. Dim characters The brightness and contrast controls are not set properly. Adjust the monitor brightness and contrast controls. Troubleshooting scenarios and solutions 69

Section	Page
Hardware overview	11
HP Z240 SFF Workstation components	12
HP Z240 SFF Workstation front panel	12
HP Z240 SFF Workstation rear panel	13
Chassis components	14
System board components	15
System board architecture	16
Workstation specifications	17
HP Z240 Tower Workstation components	18
HP Z240 Tower Workstation front panel	18
HP Z240 Tower Workstation rear panel	19
Chassis components	20
System board components	21
System board architecture	22
Workstation specifications	23
Product specifications	24
Workstation weights and dimensions	24
Environmental specifications	24
Ensuring proper ventilation	25
System management	26
Power management and performance features	26
ERP compliance mode	26
Hyper-Threading Technology (HTT)	27
SATA Power Management	27
Intel Turbo Boost Technology	27
Non-Uniform Memory Access (NUMA)	27
BIOS ROM	27
Computer Setup (F10) Utilities	28
Using Computer Setup (F10) Utilities	28
Computer Setup–Main	30
Computer Setup—Security	32
Computer Setup—Advanced	34
Desktop management	39
Initial computer configuration and deployment	40
Installing a remote system	40
Copying a setup configuration to another computer	40
Updating and managing software	41
HP Client Management Solutions	41
Altiris Client Management Solutions	41
HP SoftPaq Download Manager	42
System Software Manager	42
ROM Flash	42
Remote ROM Flash	42
HPQFlash	42
FailSafe Boot Block	42
Recovering the computer by using FailSafe Boot Block recovery mode	43
Workstation security	43
Asset tracking	43
SATA hard drive security	44
DriveLock applications	44
Using DriveLock	45
Enabling DriveLock	45
Password security	46
Establishing an administrator password using Computer Setup (F10) Utility	46
Establishing a power-on password using Computer Setup (F10) Utility	47
Entering a power-on password	47
Entering an administrator password	48
National keyboard delimiter characters	48
Clearing passwords	48
Chassis security	49
Smart Cover Sensor (optional)	49
Setting the protection level	49
Side access panel solenoid lock	49
Cable lock (optional)	49
Fault notification and recovery	49
ECC fault prediction	50
Thermal sensors	50
Programmable power button (Windows only)	50
Changing the power button configuration (Windows only)	50
Component replacement information and guidelines	51
Warnings and cautions	52
Service considerations	52
Tools and software requirements	52
Electrostatic discharge (ESD) information	53
Product recycling	54
Component replacement guidelines	54
Battery	55
Cable management	55
CPU (processor) and CPU heatsink	56
Expansion slots	57
Card configuration restrictions for power supplies	57
Choosing an expansion card slot	57
SFF workstation slot identification and description	58
SFF workstation installation sequence recommendations	59
Tower workstation slot identification and description	60
Tower workstation installation sequence recommendations	61
Hard drives and optical disc drives	61
Handling hard drives	61
Removal and replacement tips	62
Drive installation and cabling scenarios	62
SFF workstations—SATA cable connection guidelines	62
Tower workstations—SATA cable connection guidelines	62
Memory	63
Supported DIMM configurations	63
BIOS errors and warnings	63
DIMM installation guidelines	63
SFF workstation DIMM installation order	64
Tower workstation DIMM installation order	65
Power supply	66
Power supply specifications	66
Power consumption and heat dissipation	67
Resetting the power supply	67
System board	67
System cabling	68
SFF workstation system cabling	68
Tower workstation system cabling	69
Diagnostics and troubleshooting	70
Calling support	70
Locating ID labels	71
Locating warranty information	71
Diagnosis guidelines	71
Diagnosis at startup	71
Diagnosis during operation	72
Troubleshooting checklist	72
HP troubleshooting resources and tools	73
Online support	73
HP Support Center	73
HP Chat Support	73
Customer Advisories, Customer and Security Bulletins, and Customer Notices	73
Product Change Notifications	74
Helpful hints	74
At startup	74
During operation	74
Customer Self Repair	75
Troubleshooting scenarios and solutions	76
Solving minor problems	76
Solving hard drive problems	77
Solving display problems	79
Solving audio problems	81
Solving printer problems	82
Solving power supply problems	82
Testing power supply	82
Using HP PC Hardware Diagnostics (UEFI)	83
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device	84
POST error messages and diagnostic front panel LEDs and audible codes	84
POST numeric codes and text messages	85
Interpreting system validation diagnostic front panel LEDs and audible codes	90
Configuring password security and resetting CMOS	92
Preparing to configure passwords	92
Resetting the password jumper	92
Clearing and resetting the BIOS	93
Linux technical notes	95
System RAM	95
Audio	95
Network cards	96
Hyper-Threading Technology	96
NVIDIA Graphics Workstations	96
AMD Graphics Workstations	97
Configuring RAID devices	98
RAID hard drive maximum and associated storage controller options	98
Supported RAID configurations	99
Configuring Intel SATA RAID	99
Configuring system BIOS	99
Configuring RAID with the Intel utility	100
Software RAID solution	100
Software RAID considerations	100
Performance considerations	101
Configuring software RAID	101
System board designators	102
SFF workstation system board designators	102
Tower workstation system board designators	103

Match case Limit results 1 per page

Solving display problems

These suggestions apply to monitors connected to desktop and tower conﬁgurations, and to external

monitors connected to all-in-one conﬁgurations.

Problem

Cause

Solution

Blank screen (no video).

The cable connections are not

correct.

Verify the cable connections from the monitor to the

computer and to a working electrical outlet.

The monitor is oﬀ.

Turn the monitor on (LED is on). You might need to refer to the

monitor manual for an explanation of LED signals.

Screen blanking utility installed

or energy saver features

enabled.

Press a key or the mouse button and, if set, enter your

password.

System ROM is bad; system is

running in FailSafe Boot Block

mode (indicated by 8 beeps).

Reﬂash the ROM using a SoftPaq.

Fixed-sync monitor does not

sync at the resolution speciﬁed.

Verify that the monitor can accept the same horizontal scan

rate as the resolution speciﬁed.

Computer is in Hibernate mode.

Press the power button to resume from Hibernate mode.

Workstation monitor settings

are not compatible with the

monitor.

When you see

Press f8

in the bottom-right corner of the

screen, restart the computer and press

during

startup.

Using the keyboard arrow keys, select

Enable VGA

Mode

, and then press

enter.

For Windows, double-click the

Display

icon in the

Control Panel and then select the

Settings

tab.

Use the sliding control to reset the resolution.

The display works properly during

the POST but goes blank when the

operating system starts.

The display settings in the

operating system are

incompatible with your graphics

card and monitor.

For Windows, restart your computer in VGA mode.

After the operating system starts, change the display

settings to match those supported by your graphics card

and monitor.

Refer to your operating system and graphics card

documentation for information about changing display

settings.

Power LED ﬂashes red 6 times (once

every second), followed by a two-

second pause, and then the

computer beeps 6 times.

Pre-video graphics error.

For systems with a graphics card:

Reseat the graphics card.

If the card requires external power, make sure the power

cable is properly connected.

Replace the graphics card.

Replace the system board.

For systems with no graphics card installed, the CPU may have

no integrated graphics capability.

Monitor does not function when used

with Energy Saver features.

Monitor without Energy Saver

capabilities is being used with

Energy Saver features enabled.

Disable the monitor Energy Saver feature.

Dim characters

The brightness and contrast

controls are not set properly.

Adjust the monitor brightness and contrast controls.

Troubleshooting scenarios and solutions