My Sony laptop does not have any sound. No sound card has been installed. Tried Sony support, but no support available unless you have a serial number (non available). When i check 'Sound & Mulitmedia' properties, it shows No Playback/Recording/Midi playback devices. I have no recovery disks.

I m using Sony Viao (PCG-F801A) with Windows 2000 Pro. Please advise.