Jasku
Guide
If you have eliminated the hdmi cable as a potential issue, you might have to set the refresh rate to 50/60hz in the Nvidia settings of your gpu, also verify the same on the TV, there is a memc mode or something that people on the other forums referred to.Anybody using this as a monitor..
My nvidia gts 450 has some problems detecting the TV as a secondary screen..
Detects the HDMI source displays for some time and then disappears. This happens randomly..
Also sometimes shows Hitachi as the source in EDID.. Where the native res is 1080p
And switches to generic vga and has 1024*768 as res
Radeon based laptop works fine.. Other than the overscan/underscan problem
Raspberry works completely fine