I'm a newbie, but had the same problem. Long story short I set my bios settings to lcd, my res. to 800x600. My screen came up no vga signal.
So I took my computer back into the house and could'nt get a pic on my lcd monitor in my house either, considering that I had just put some new programs in from my house 10 mins ago, I figured it had to be the new setting(lcd) but now I could'nt even get a pic to change my settings. So I had to reset my cmos. This worked I got pic back on my house lcd. Then I went back outside and it also worked on my lilliput. Like I said I'm a newbie and more of a try things till it works type of guy, but I thought I could possibly help. Good luck!!!