So the screen has VGA only? What does the PC have?
If the PC has DVI-I (note the four little connectors near the flat "blade" on the wikipedia pictures) then you can get a passive DVI to VGA cable which will work fine.
Anything else is probably a no go without an expensive active adaptor.
Input HD HDMI to Output VGA Cable Converter Adapter
Aye ive found one, local seller too
Thanks guys