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Resumen del manual
8. If the Issue is still not resolved, see “Online Support Information” on page 165. Abnormal Video Display If video displays abnormally, perform the following actions one at a time to correct the problem. 1. Reboot the computer. 2. If permanent vertical/horizontal lines or dark spots display in the same location, the LCD is faulty and should be replaced. See “Disassembly Process” on page 34. 3. If extensive pixel damage is present (different colored spots in the same locations on the screen), the LCD is faulty and should be replaced. See “Disassembly Process” on page 34. 4. Adjust the brightness to its highest level. See the User Manual for instructions on adjusting settings. NOTE: Ensure that the computer is not running on battery alone as this may reduce display brightness. If the display is too dim at the highest brightness setting, the LCD is faulty and should be replaced. See “Disassembly Process” on page 34. 5. Check the display resolution is correctly configured: a. Minimize or close all Windows. b. If display size is only abnormal in an application, check the view settings and control/mouse wheel zoom feature in the application. c. If desktop display resolution is not normal, right-click on the desktop and select Personalize.. Display Settings. d. Click and drag the Resolution slider to the desired resolution. e. Click Apply and check the display. Readjust if necessary. 6. Roll back the video driver to the previous version if updated. 7. Remove and reinstall the video driver. 8. 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. 9. If the Issue is still not resolved, see “Online Support Information” on page 165. 10. Run the Windows Memory Diagnostic from the operating system DVD and follow the onscreen prompts. 11. If the Issue is still not resolved, see “Online Support Information” on page 165. Random Loss of BIOS Settings If the computer is experiencing intermittent loss of BIOS information, perform the following actions one at a time to correct the problem. 1. If the computer is more than one year old, replace the CMOS battery. 2. Run a complete virus scan using up-to-date software to ensure the computer is virus free. 3. If the computer is experiencing HDD or ODD BIOS information loss, disconnect and reconnect the power and data cables between devices. If the BIOS settings are still lost, replace the cables. 4. If HDD information is missing from the BIOS, the drive may be defective and should be replaced. 5. Replace the Motherboard. 146 Chapter 4 6. If the Issue is still not resolved, see “Online Support Information” on page 165. LCD Failure If the LCD fails, perform the following actions one at a time to correct the problem. Do not replace non- defective FRUs: Start StartStart OK Check LCD module? Swap LCD cable /LCD panel NG - Check MB LCD connector and cable ? OK Reassemble Re-plug LCD cable OK NG Swap M/B Chapter 4 147 Built-In Keyboard Failure If the built-in Keyboard fails, perform the following actions one at a time to correct the problem. Do not replace non-defective FRUs: Start Keyboard properly connected? No Disconnect and reconnect Keyboard functioning? No Replace Keyboard Replace mainboard 148 Chapter 4 TouchPad Failure If the TouchPad doesn’t work, perform the following actions one at a time to correct the problem. Do not replace non-defective FRUs: Start Check M/B T/P FFC Re-assemble the T/P FFC to M/B OK NG Check TouchPad OK OK NG Swap M/B Swap/Reassemble the T/P board or T/P FFC Chapter 4 Internal Speaker Failure If the internal Speakers fail, perform the following actions one at a time to correct the problem. Do not replace non-defective FRUs: Start Check M/B SPK cable Re-assemble the SPK cable to M/B OK NG Check Logic Upper/Logic upper OK OK NG Swap M/B Swap Logic lower/Logic upper Sound Problems If sound problems are experienced, perform the following actions one at a time to correct the problem. 1. Reboot the computer. 2. Navigate to Start• Control Panel• System and Maintenance• System• Device Manager. 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. 3. Roll back the audio driver to the previous version, if updated recently. 4. Remove and reinstall the audio driver. 5. Ensure that all volume controls are set mid range: a. Click the volume icon on the taskbar and drag the slider to 50. Ensure that the volume is not muted. b. Click Mixer to verify that other audio applications are set to 50 and not muted. 6. Navigate to Start• Control Panel• Hardware and Sound• Sound. Ensure that Speakers are selected as the default audio device (green check mark). NOTE: If Speakers does not show, right-click on the Playback tab and select Show Disabled Devices (clear by default). 7....
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