Acer Aspire 5755 User Manual

4-10 Troubleshooting
Internal Speaker Failure 0
If internal Speakers fail, perform the following:
Figure 4-6. Internal Speaker Failure
Sound Problems 0
Perform the following:
1. Boot 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. If updated recently, roll back the audio driver to the previous version.
4. Remove and reinstall the audio driver.
5. Make sure that all volume controls are set mid range:
Click the volume icon on the taskbar
Drag the slider to 50. Confirm that the volume is not muted.
Click Mixer to verify that other audio applications are set to 50 and not muted.
Start
OK
NG
OK
NG
Swap M/B
Check M/B SPK cable
Check Logic upper
Re-assemble the SPK
cable to M/B
Swap Logic upper
SG_JV51_HR.book Page 10 Friday, July 8, 2011 5:58 PM

Acer Aspire 5755 Specifications

General

RAM	Up to 8 GB DDR3
Display	15.6-inch HD (1366 x 768)
Graphics	Intel HD Graphics 3000 or NVIDIA GeForce GT 520M / 540M
Operating System	Windows 7 Home Premium
Battery	6-cell Li-ion
Optical Drive	DVD-Super Multi DL drive
Chipset	Intel HM65 Express
LAN	Gigabit Ethernet
Webcam	1.3MP
Processor	Intel Core i3/i5/i7
Weight	2.6 kg
Ports	3 x USB 2.0, HDMI, VGA
Wireless	Wi-Fi 802.11b/g/n
Card Reader	SD, MMC
Storage	320 GB, 500 GB, 640 GB, 750 GB HDD