My brother uses this Lenovo G780 laptop with Windows 7 64-bits running on it. Recently, there's no sound coming out of it anymore.
There used to be a ! in device manager, so I reinstalled the Conexant sound drivers, but that didn't work. The ! was gone though, but no playback devices were listed. I tried removing the device, rebooting and using Microsofts generic High Definition Audio Device drivers, but that didn't help either. Everything is still ok in Device Manager and now there are also playback devices listed, but there's no sound coming out of them. (No, I have not pressed any mute button anywhere.) Reinstalling the Conexant drivers now fails though, because it can not find the device anymore. When clicking on the sound icon in the lower right of my screen, a problem solving wizard appears and tells me that the audio device is turned off, which is definitely not the case.
I have also tried headphones, but they didn't work either. Furthermore, almost every game on the machine crashes with some error that points to a sound card problem.
Now for the questions:
- Is there any way that this is not a hardware problem? Sadly, I have no usable restore points. Also, as far as I can tell there has not been a software installation or Windows update that caused the troubles.
- Is there an easy way to test whether the hardware is ok? It appears that information that Windows gives me can not really be trusted. I have not tried reinstalling the OS yet, but I very much doubt it will help.
Thanks in advance!