VGN TX650P FN keys and AV buttons are not working after reinstalling windows and drivers.

Normally this issue happens after installing the a system related software or an upgrading/ reinstalling a operating system. Please read the below steps very carefully and follow the procedure below to resolve the issue.
Download and install the following application updates in the exact order they are given.

IMPORTANT:All of the listed application updates are available online. Software and driver updates for your Sony product are available online.

1. Audio Driver (most recent)
2. Video Driver (most recent)
3. Sony Firmware Extension Parser Device Driver
4. Sony Shared Library Update
5. Sony Setting Utilities Update
6. VAIO Event Services Update (If available)
7. VAIO Launcher Software (S1/S2/AV Buttons)

If the above order does not work, try the order below.

1. Audio Driver (most recent)
2. Video Driver (most recent)
3. Sony Programmable I/O Control Device Driver Utility or Sony Notebook Control Driver
4. Sony Shared Library Update
5. Sony Utilities DLL Update
6. Sony Event Service (If available)
7. Sony AV Mode Button Utility (If available)

Reference: The function keys do not work

Did you try pressing Fn +Fn keys?

uninstall the acpci driver from the add/remove then reinstall

Hi,

The touch sensor buttons that control the AV Mode, volume, play, fast forward, etc. may stop working if the Synaptics Pointing Driver is uninstalled or if the file is corrupted. Follow this procedure to reinstall the Synaptics Pointing Driver.

Downloading and installing the Synaptics driver update available through the below link on this page will also resolve this issue.

http://esupport.sony.com/US/perl/swu-download.pl?mdl=VGNCS118E&upd_id=3783&os_id=28

After installing, reset the BIOS to its default values.
Click the Start button, and then click on Computer .
In the Computer window, under Hard Disk Drives , double-click on (C:) .
Double-click the Windows folder.
Double-click the DRIVERS folder.
Double-click the .EXE folder.
Double-click the Pointing Driver (Synaptics) folder
Double-click on the setup or setup.exe icon.
Follow the Synaptics Pointing Driver Installation wizard instructions to install the driver.

When the installation setup is complete, a You must restart your computer to apply these changes window will appear. Choose the Restart Now button for proper installation .


Thanks!!!!

you can get the instructions on how to change the av mode button from the user manual of you computer. click on the link esupport.sony.com

• the steps on how to change it is on page 30
  

plz chake ur av drivers some drivers does not support vista that's way you have to find a supported drivers.

These instructions are for Windows XP:

• The volume button, brightness key, and disc eject button on some computers will not work if the HotKey Utility application is not running.
• The Magnify button and the Fn keys will not function properly before the operating system has finished starting.
• The setting may not be saved if the ESC key is used to close the Fn display. Press the ENTER key or allow the Fn display to close automatically to save the setting.

1. Click the Start button, then click Run .
2. In the Run window, next to Open , type MSCONFIG .
3. Press the ENTER key.
4. In the System Configuration Utility window, click the Startup tab.
5. On the Startup tab, under Startup Item , ensure that there is a check in the HKserv checkbox. NOTE: If HKserv is missing, reinstall the HotKey Utility application and the Sony Utilities Library.
   
6. Click the OK button.
7. In the System Configuration box, click the restart button.

if you have important docs, remove the hard drive and purchase a sata to usb connector/psu from ebay to recover your docs on another machine, then reload the hard drive and tap the f10 key. this will allow you to restore the hard drive, you will have options to restore follow the one that best suits you and you are home free!

Good Luck!
Ruben

Follow this procedure to enable the special buttons or function keys on the computer or keyboard in the Microsoft® Windows® XP operating system.
IMPORTANT:

• If software has been installed for use with a third-party keyboard or mouse, uninstall the software to ensure there are no conflicts.
• On AMD™ or Transmeta™ processor-based computers, the function keys are hardware controlled and not controlled by a hot-key utility.

NOTES:

• The volume button, brightness key, and disc eject button on some computers will not work if the HotKey Utility application is not running.
• The Magnify button and the Fn keys will not function properly before the operating system has finished starting.
• The setting may not be saved if the ESC key is used to close the Fn display. Press the ENTER key or allow the Fn display to close automatically to save the setting.

1. Click the Start button, then click Run .
2. In the Run window, next to Open , type MSCONFIG .
3. Press the ENTER key.
4. In the System Configuration Utility window, click the Startup tab.
5. On the Startup tab, under Startup Item , ensure that there is a check in the HKserv checkbox. NOTE: If HKserv is missing, reinstall the HotKey Utility application and the Sony Utilities Library.
   
6. Click the OK button.
7. In the System Configuration box, click the restart button.

what default language did you select when you installed OS??
Which OS are you using?
Have you done a windows update for this yet??
Check device manager for any issues to resolve??
Maybe the selected setings need adjusting??