spudly1987 0 Light Poster

yes i have a question if someone can help, i have an LCD tv
LG 23LX2R [Monitor] (29.3"vis, March 2005)

for some reason i am unable to view the bios on the screen so that if i want to change boot sequence but i can not see the screen, i cant even see the advanced start up options screen...

can anyone help or have any ideas