My laptop Sony Vaio model is PCG-3C2L, i have any questions below: where can i find to download driver for the "Fn" key ? because i cannot use this key with the F1, F2, etc. i.e Fn + F3. Furthermore the key for touch on "AV MODE" is not run? maybe it lost its driver too. Please kindly tell me where can i download those driver and how to install it. Kinds regards,

You may be able to find out the answer to your question on sony's web site and customer support. All the manuels for your machine should be able to download there.

Hey,

Sony vaio pcg-7g2n Driver Download offers an overview of the drivers are installed, as well as links to be able to bring to download for Windows 7, Windows 8, and Windows 10.

When installing drivers for Sony VAIO important to follow the correct sequence of installing these drivers in order to avoid problems with the work of the function keys: volume+Fn, brightness+Fn, input switching+Fn, and others.
Drivers Download

The charging circuit in the laptop maybe faulty.

https://community.sony.cz/t5/pcs-accessories/which-driver-controls-the-fn-key-functions/td-p/208751


https://community.sony.com/t5/VAIO-Software-Other-Operating/Sony-VAIO-VPCCB32FD-FN-key-not-working-on-fresh-Windows-7/td-p/327298

You're having a audio drivers try searching for you're right driver on google just type you're laptop brand and serial number + audio drivers

may be not have installed all drivers and applications
You can find on this page :
http://esupport.sony.com/perl/swu-list.pl?mdl=PCGV505EX#div_pos_66

Hi,

You can go through this link http://www.notebook-driver.com/sony-vaio/drivers-and-utilities-for-sony-vaio-pcg-c1-picture-series-notebook/ and download the desired drivers or can straight away contact sony customer care.

it sounds like a problem with your harddrive. if you have an oem copy of your OS then you could do a chkdsk /r from this. If not then the harddrive will have to be removed and the chkdsk /r done from a data reader from another computer. Hope this helps, leave feedback

Hi all drivers for Sony Vaio PCG-791M VGN-FS115S is hire:
http://hl-computerservice.com/forum/viewtopic.php?f=1&t=13
http://hotfile.com/dl/22635660/be0944a/PCG-791M_VGN-FS115S_Drivers.zip.html

the best bet would be check your oem website for drivers becus the drivers maybe be for specific models.