Hello, everytime I launch star wars lego the complete saga, it plays a little of the intro music and then the music stops and there is no audio while playing the game. Help!??

Any informations about your system? Audiocard? OS?
Do you have multiple sound devices in your system config?

I never had any problems with this game.
But you can always try an emulator like IndirectSound.
https://www.indirectsound.com/

You probably solved the problem already, but this is what a quick google brought up:

I'm not sure about Lego Star Wars but I know Lego Harry Potter has a similar problem which is fixd by changing the audio quality/ audio configuration settings so worth trying that

There are also some games that don't work well if in the system sound settings the card is set to a frequency of n * 48kHz instead of n * 44.1kHz but usually that only causes asynchron cut scenes. In on case (original version of Ghostbusters the video game) I had to set the frequencs to exactly 44.1 kHz, otherwise the speech would be pitched by log2(n-1) octaves.