anyway to stop my HDTV from switching off when i restart pc

Samsung series 5( LE32B551A)
32" 1080p via VGA.

When i restart my computer the tv goes off but doesnt come back on.
i can hear windows sound as it boots to the desktop but no picture.
i have to switch tv off then back on then reslect INPUT: PC.

bit of a pain.

there are power saving settings on the tv but none of them seem to help.

can i change something in my bios that will stop the tv from switching off when i restart the computer ?

EDIT: power saving features are all off on pc. hibernate ect

pressing keys or moving the mouse doesnt switch the display back on

latest graphics drivers for ATI installed.
but also have the problem using windows xp on another PC.

when i dont have the top (1920x1080) resolution selected. for example: 800x600 the computer will restart and the screen stays on lol. how annoying

also have used 3 different vga cables including a cable with all 15 pins