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Troubleshooting Video and Display Issues
Содержание книги
- Table 1-4 Major CMOS/BIOS Settings
- Table 1-5 Motherboard Form Factors
- Adapter Cards and Integrated Ports
- Daughter Boards and Riser Boards
- Installing SATA, PATA, and SCSI drives
- Table 1-10 typical PATA settings on systems with two PATA host adapters and two drives
- Table 1-12 Power Fluctuations
- Table 2-2 EIA-568-A Wire Pairs and Pins
- Public, Private, and APIPA IP Addresses
- Static and Dynamic IP Addresses
- Table 2-6 Ports and Protocols
- Installing and Configuring a SOHO Router
- Table 2-9 Common DSL Services Compared
- Line-of-Sight Wireless Internet Service
- Install and Configure Laptop Hardware and
- Other Laptop Display Components
- Docking Station Versus Port Replicator
- Table 4-1 Laser-Printing Process
- Printer Installation and Connections
- Lifting and Moving Equipment Safely
- Communication and Professionalism
- Windows XP, Windows Vista, and Windows
- UAC and the Administrator Account
- Table 6-5 Command-Line Tools for Networking
- Features and Tools Usage How to Run
- Control Panel Options Unique to Windows 7
- Table 6-12 Network Settings by Windows Version
- Table 6-14 Recommended Preventive Maintenance Tasks in Windows
- Virtualization Resource Requirements
- Security Best Practices for Workstation Security
- Data Destruction and Disposal Methods
- Table 7-4 Securing a SOHO Wired Network
- Getting Applications for Your Device
- Mobile Network Connectivity and Email
- Laptop and Tablets: How They’re Different
- Gather Data from the Customer
- Table 9-2 Motherboard, RAM, CPU, and Power Symptoms, Causes, Solutions
- Troubleshooting Video and Display Issues
- Table 9-6 Troubleshooting Tools for Wired and Wireless Networks
- Table 9-9 Operating Systems Symptoms, Problems, and Solutions
- Troubleshooting Security Issues
- Troubleshooting Laptop Issues
- Table 9-13 Tools for Fixing Printer Problems
- CMOS (complementary metal-oxide semiconduc-tor), 11-15, 94
- Digital access, prevention methods, 136-140
- FORMAT command-line tool, 112
- ISPs (Internet service pro-viders), 44
- NSLOOKUP command-line tool, 112
- Preventive maintenance, Windows, 127
- System protection setting (Control Panel), 119
Video and display issues can be difficult to troubleshoot, especially if you do not have a spare video card or display to use for swapping. Use Table 9-5 to look up typical symptoms, causes, and solutions for video and display issues.
Table 9-5 Video and Display Symptoms, Problems, and Solutions
| Symptom
| Possible Cause
| Items to Check
| Typical Solution
| |
|
|
|
| | VGA mode
| Incorrect driver
| Verify that the correct
| Install the latest driver for
| |
| for video hard-
| driver is installed.
| the video hardware from
| |
| ware
|
| the GPU or hardware
| |
|
|
| vendor.
| |
|
|
|
| |
| System booted
| Check the startup mode
| Restart the system in nor-
| |
| to Safe mode or
| in use.
| mal mode.
| |
| VGA mode
|
| If the system will start
| |
|
|
| |
|
|
| only in VGA mode,
| |
|
|
| replace the video drivers.
| |
|
|
| If the system will start
| |
|
|
| only in Safe mode, use
| |
|
|
| MSConfig to disable
| |
|
|
| startup options until sys-
| |
|
|
| tem starts normally.
| |
|
|
|
|
|
|
|
| Chapter 9: Troubleshooting 179
| |
|
|
|
| |
|
|
|
| | Symptom
| Possible Cause
| Items to Check
| Typical Solution
| |
|
|
|
| | No image on
| Loose or discon-
| Check the video cable
| Turn off system and dis-
| | screen
| nected video
| connections on the
| play before disconnecting
| |
| cable
| computer and display.
| and reconnecting cables.
| |
|
|
|
| |
| Incorrect selec-
| Check the video cable
| Use the display control
| |
| tion of input sig-
| to determine the video
| to select the correct input
| |
| nal (LCD, LED
| signal type.
| type.
| |
| panels with VGA
|
|
| |
| and other input)
|
|
| 
Vertical refresh Press Esc to return to
rate out of range previous resolution (if
(LCD, LED) just selected).
Shut down the system and restart it in VGA mode.
Reselect the correct verti-cal refresh rate and restart the system.
| Overheat
| Failure of fan
| Check the video card or
| | shutdown
| on video card’s
| chipset for fan failure.
| |
| active heatsink
|
| 
If the fan on video card has failed, replace the fan if possible.
If the fan on video card has not failed, add more fans to case and reroute the cables to improve airflow.
| Dead pixels
| Defective LCD or
| Gently tap the screen
| Check with the vendor
| |
| LED panel
| over stuck or dead
| to determine the number
| |
|
| pixels.
| of defective pixels that
| |
|
|
| qualify for warranty
| |
|
|
| replacement.
| |
|
|
| Replace the panel if the
| |
|
|
| pixels are distracting.
| |
|
|
|
| | Artifacts
| Small bitmap
| Check the dimensions
| A full-screen image
| |
| image over mag-
| of images with artifacts.
| should have at least the
| |
| nified
|
| same dimensions as the
| |
|
|
| display to avoid artifact-
| |
|
|
| ing.
| |
|
|
| Reduce large images to
| |
|
|
| smaller size instead of
| |
|
|
| enlarging small images to
| |
|
|
| avoid artifacts.
| |
|
|
|
|
180 CompTIA A+ Quick Reference
Table 9-5 Continued
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