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THX FOR THE WEBSITES INFO IF YOU DONT MIND PLEASE PASS THIS FIX ON MAY HELP
VGX XL3 FIXED SOUND HDMI VISTA
switched my vgx xl301 to sony 46 kdl smart tv no sound picture was ok
did all usual updated nvidia 7600 gtl drivers & sound drivers then i found
a hdmi sound driver that replaces the firmwire its at the us sony site
type in VGX XL3 DRIVERS THATS THERE NAME FOR THE XL301/302 MODELS
i first got the nvida driver then the hdmi driver in video & audio (sound) HDMI™ Software UpdateRelease Date12/19/2007 Version 071025cFile Size56.83 MB
File Description
This utility updates the HDMI™ software to version 071025c to resolve an issue with no sound when using an HDMI connection.
sound sorted but picture flickers at start up then adjusts ok remember to back up everything and good luck