Re-download all the Drivers for your Graphics Card.
2)Try re-starting your Graphics card.
3)Try Changeing to Lower Quilty.
4)Empire is a hard-Graphics RATED game. you might need a new Graphics Card if its not in good Condtition
You can buy one for $120.00 (Max Quilty)
You can buy one for $90.00 (Medium) **Recommened**
You can buy one for $50-60.00 (LOW) **Ok for Netbooks**
and search for a Normal graphics card.
a MAX will cost you $120.00-$150.00
Hope i Helped
If the graphics card is NOT causeing the problem.
Try the Following
-Update Sound Drivers
-Open your case and check for any Disconnected Wires
-Check your Video/Sound Drivers
And lol make sure its not Muted.
Whisper me if this Doesnt Work.