1024x768 on VGA with LCD TV

Hi ,

I am on linux-omap-2.6.32 kernel, trying to put display on VGA with
1024x768. But
(1) LG LCD TV with 19 inch - works fine
(2) LG LCD TV with 26 inch shows “No signal”
(3) Samsung LCD also shows “No signal”
(4) AOC monitor - works fine

fbset shows
"mode “1024x768-57”

D: 61.717 MHz, H: 45.920 kHz, V: 56.973 Hz

geometry 1024 768 1024 768 32
timings 16203 24 160 3 29 136 6
rgba 8/16,8/8,8/0,8/24
endmode"

Any reason why some TVs don’t detect. Is pixelclock or refresh
frequency a issue.

Where as 720x482 and 640x400 works fine on all LCD TVs.

regards
purush