
4-6
Troubleshooting
6.
If the POST or video appears on the external display only, refer to
LCD Failure
.
7.
Disconnect power and all external devices including port replicators or docking stations.
Remove any memory cards and CD/DVD discs.
8.
Start the computer. If the computer boots correctly, add the devices one by one until the
failure point is discovered.
9.
Reseat the memory modules.
10. Remove the drives (refer to
Maintenance Flowchart
).
11. If the Issue is still not resolved, refer to
Online Support Information
.
Abnormal Video
0
If the video appears abnormal, perform the following:
1.
Boot the computer.
If permanent vertical/horizontal lines or dark spots appear in the same location, the LCD is faulty
and should be replaced. Refer to Disassembly Process.
If extensive pixel damage is present (different colored spots in the same locations on the screen),
the LCD is faulty and should be replaced. Refer to
Maintenance Flowchart
.
NOTE:
NOTE
:
Make sure that the computer is not running on battery alone as this may reduce display
brightness.
2.
Adjust the brightness to its highest level. Refer to the User Manual for instructions on
adjusting the settings. If the display is too dim at the highest brightness setting, the LCD is
faulty and should be replaced. Refer to
Disassembly Process
.
3.
Check the display resolution is correctly configured:
Minimize or close all Windows.
If display size is only abnormal in an application, check the view settings and control/mouse
wheel zoom feature in the application.
If desktop display resolution is not normal, right-click on the desktop and select
Personalize
Display Settings
.
Click and drag the Resolution slider to the desired resolution.
Click
Apply
and check the display. Readjust if necessary.
4.
Roll back the video driver to the previous version if updated.
5.
Remove and reinstall the video driver.
6.
Check the Device Manager to determine that:
The device is properly installed. There are no red Xs or yellow exclamation marks
There are no device conflicts
No hardware is listed under
Other Devices
7.
If the Issue is still not resolved, refer to
Online Support Information
.
8.
Run the
Windows Memory Diagnostic
from the operating system DVD and follow the
on-screen prompts.
9.
If the issue is still not resolved, refer to
Online Support Information
.
Содержание E644
Страница 1: ...eMachines E644 E644G SERVICEGUIDE ...
Страница 4: ...iv ...
Страница 10: ...x ...
Страница 11: ...CHAPTER 1 Hardware Specifications ...
Страница 14: ...1 4 ...
Страница 32: ...1 22 Hardware Specifications and Configurations System Block Diagram Figure 1 10 System Block Diagram ...
Страница 53: ...CHAPTER 2 System Utilities ...
Страница 80: ...2 28 System Utilities ...
Страница 81: ...CHAPTER 3 Machine Maintenance Procedures ...
Страница 84: ...3 4 ...
Страница 118: ...3 38 Machine Maintenance Procedures ID Size Quantity Screw Type B ICW50 CPU Thermal Screw 4 ...
Страница 135: ...CHAPTER 4 Troubleshooting ...
Страница 141: ...Troubleshooting 4 7 LCD Failure 0 If the LCD fails perform the following Figure 4 3 LCD Failure ...
Страница 142: ...4 8 Troubleshooting Keyboard Failure 0 If the Keyboard fails perform the following Figure 4 4 Keyboard Failure ...
Страница 143: ...Troubleshooting 4 9 Touchpad Failure 0 If the Touchpad fails perform the following Figure 4 5 Touchpad Failure ...
Страница 147: ...Troubleshooting 4 13 USB Failure 0 If the USB fails perform the following Figure 4 8 USB Failure ...
Страница 148: ...4 14 Troubleshooting Wireless Failure 0 If the wireless fails perform the following Figure 4 9 Wireless Failure ...
Страница 149: ...Troubleshooting 4 15 Bluetooth Failure 0 If the wireless fails perform the following Figure 4 10 Bluetooth Failure ...
Страница 162: ...4 28 Troubleshooting ...
Страница 163: ...CHAPTER 5 Jumper and Connector Locations ...
Страница 172: ...5 10 Jumper and Connector Locations ...
Страница 173: ...CHAPTER 6 FRU Field Replaceable Unit List ...
Страница 174: ...6 2 Exploded Diagrams 6 4 FRU List 6 6 Screw List 6 18 ...
Страница 191: ...CHAPTER 7 Model Definition and Configuration ...
Страница 192: ...7 2 eMachines E644 7 3 eMachines E644G 7 8 ...
Страница 200: ...7 10 Model Definition and Configuration ...
Страница 201: ...CHAPTER 8 Test Compatible Components ...
Страница 202: ...8 2 Microsoft Windows 7 Environment Test 8 4 ...
Страница 212: ...8 12 Test Compatible Components ...
Страница 213: ...CHAPTER 9 Online Support Information ...
Страница 214: ...9 2 Introduction 9 3 ...
Страница 216: ...9 4 Online Support Information ...