Many TVs account for the lag. Others have settings to adjust the lag. Some TVs have no way to adjust for this and you will have to change out cables until you get one that works best for your situation.
You can divide the sound and video using the audio out on the computer and using the TVs RCA input jacks for the audio. Most TVs will work without lag this way. But if you do get lag then you can add more cable to the audio side until the lag goes away.