I really wish it was that simple. There are still some other software steps that can be tried, especially if you haven't tried updating drivers yet. That is usually one of the first steps with a glitch issue like this. It's similar to first making sure a device is plugged in to a power outlet, when it won't turn on.
Here are the drivers for your notebook. It would be helpful to know if they were outdated or not before downloading the drivers below. Comparing your current versions will let you know if the driver was already up-to-date. If the driver is already up-to-date, itcould be helpful to reinstall it.
To Check You Current Driver Versions:
In Device Manager, for audio, expand sound, video and game controllers and double-click on IDT HD Audio. Click on the Driver tab and compare the version number to the audio version number below.
In Device Manager, for graphics, expand display adapter and double-click on AMD Radeon 7520. Click the Driver tab and compare the version number to the graphics version below.
To check your current BIOS version
Windows 7: Click Start , enter msinfo32 in the search field, and then select msinfo32.exe from the list of results. In the System Information window under the System Summary category, look for the BIOS Version/Date entry. This is your current BIOS version. Compare it with the version below. Figure 1: BIOS Version/Date
Latest Updates to those drivers:
IDT HD Audio Driver version 6.10.6381.0 (sp56460)
AMD HD Graphics Driver 8.941.1.0 (sp56458)
BIOS Driver version F.26 (sp60936)
Let me know what results you get once the drivers are updated.