I connected my computer to an old 32inch (lcd tv) via a VGA cable. it only supports 1024x768 while in the settings there is a max upto 2560x1440, when i choose it reverts back to 1024x768 and says "not support" so my tv does not support high resolutions? or my computer isnt capable? (i get 1920x1080 in my main 21.5 inch monitor)