[SOLVED] Screen Resolution

Hi I connected by Acer aspire one to an LG19LS4D. The highest resolution that can be selected in the monitor settings is 1024x768. I know that both the netbook and TV can support a higher resolution than this. i also tried connecting to another monitor and this allowed me to select 1280x768. So is there any way I can force a resolution when I connect to my LG?. I am running peppermint OS3

See here:
https://wiki.ubuntu.com/X/Config/Resolution#Adding_undetected_resolutions