Acer Aspire E1-521 Notebook Service Guide
Page 54
.... • Flash utility has auto execution function. 2-13 System Utilities See Creating a USB Flash Crisis Disk on page 2-28. • Do not install memory related drivers (XMS, EMS, DPMI) when BIOS Flash is used • Use an AC adapter power supply when running BIOS Flash utility. BIOS Flash Utilities BIOS Flash...
.... • Flash utility has auto execution function. 2-13 System Utilities See Creating a USB Flash Crisis Disk on page 2-28. • Do not install memory related drivers (XMS, EMS, DPMI) when BIOS Flash is used • Use an AC adapter power supply when running BIOS Flash utility. BIOS Flash Utilities BIOS Flash...
Acer Aspire E1-521 Notebook Service Guide
Page 86
..., perform the following: 1. If the display is too dim at the highest brightness setting, the LCD is listed under Other Devices 7. Roll back the video driver to Online Support Information on page 8-2. 4-5 Troubleshooting If the issue is faulty and should be replaced. Adjust the brightness to the User Manual for instructions...; There are no device conflicts • No hardware is faulty and should be replaced. 3. 11. Refer to its highest level. Remove and reinstall the video driver. 6.
..., perform the following: 1. If the display is too dim at the highest brightness setting, the LCD is listed under Other Devices 7. Roll back the video driver to Online Support Information on page 8-2. 4-5 Troubleshooting If the issue is faulty and should be replaced. Adjust the brightness to the User Manual for instructions...; There are no device conflicts • No hardware is faulty and should be replaced. 3. 11. Refer to its highest level. Remove and reinstall the video driver. 6.
Acer Aspire E1-521 Notebook Service Guide
Page 90
...exclamation marks • There are set to M/B Check Logic lower OK Swap M/B NG Swap Logic lower Figure 4:6. Remove and reinstall the audio driver. 5. Check the Device Manager to determine that other audio applications are set mid range: • Click the volume icon on the taskbar ... There are no device conflicts • No hardware is not muted. • Click Mixer to 50. If updated recently, roll back the audio driver to Start > Control Panel > System and Maintenance > System > Device Manager. Confirm that the volume is listed under Other Devices 3. Internal Speaker ...
...exclamation marks • There are set to M/B Check Logic lower OK Swap M/B NG Swap Logic lower Figure 4:6. Remove and reinstall the audio driver. 5. Check the Device Manager to determine that other audio applications are set mid range: • Click the volume icon on the taskbar ... There are no device conflicts • No hardware is not muted. • Click Mixer to 50. If updated recently, roll back the audio driver to Start > Control Panel > System and Maintenance > System > Device Manager. Confirm that the volume is listed under Other Devices 3. Internal Speaker ...