So I have this really weird problem!

Hi guys

I wasn't sure if this is the right place to ask this and if it isn't I'm sorry.

I have a PC, 1 23" monitor connected though dvi. When I connect my 40" tv though HDMI, my monitor goes into standby mode.

I want to use my tv as an extended display. Please help.

I'm using Windows 7 64bit and an integrated Ati graphics