LG 46" HD 1080p LCD TV (HDMI NOT WORKING) TV STILL TURNS ON

LG 46LD550 is a 46-inch Full HD 1080p LCD TV with TruMotion 120Hz technology. Key specifications include: Resolution: 1920 x 1080 (Full HD 1080p) Refresh Rate: 120Hz TruMotion technology for reduced motion blur Screen Size: 46 inches (45.9 inches diagonal class) Contrast Ratio: 150,000:1 Response Time: 2.4 milliseconds Tuner: Built-in ATSC/NTSC/QAM tuner Connectivity: Includes 4 HDMI inputs (3 rear, 1 side), 2 component video inputs, and optical audio out Audio: 10W + 10W output power Features: NetCast Entertainment Access (broadband access), Smart Energy Saving features, and ISFccc Ready Haven't really looked at the HDMI connection. Wouldn't know what I was doing even if I did. But it's not working, don't know if it's a simple fix or not.