I have a HP notebook running windows 7 64bit with Radeon HD 5650 and connected to the HDMI output port on the HDMI input port on your TV LED LG (120Hz) but the image does not appear. I tested the 3 HDMI ports and nothing! That my TV works 120hz and laptop works 60Hz.
The cable would not be because they are working perfectly. I tested all 3.
I noticed on the "resolution" menu of Windows detected the LG TV - even shows the name "LG TV" but nothing is shown on TV. Even the "INPUT" menu TV entries appear as unable, as if nothing is plugged into TV.
Interesting that connected another computer HP Deskjet Slimline and it worked.
I think it is some setting on the video card in "EDED" options.
following the information needed to detect and fix the problem.
Notebook - HP Envy 14' 1085eo (http://h10025.www1.hp.com/ewfrf/wc/product?cc=fi&lc=fi&dlc=fi&tmp_geoLoc=true&product=4247055)
Graphics Card - AMD RADEON HD 5650 (as program CPU-z)
Memory - 1024Mbytes
Operating System - Windows 7 64-bit
Issue Details - as described
Catalyst Control Center - version 2012.0928.1532.26058
Motherboard or System Make & Model - HP Model 1437
Chipset - intel DMI Host Bridge
BIOS - HP Version F.26, date 12/01/2011
Graphic Interface Version PCI-Express
Link Width - x16
Device Connection Used - HDMI out (laptop HP) for HDMI in (TV)
CPU Details -
Processor - Intel Core i7 720QM 1.60Hz
Package - Socket 989 rPGA
Memory - DDR3 4Gb
THANKS FOR HELP.