Laptop HDMI to DVI-I external monitor - no signal
I'm trying to connect a laptop to an external monitor using an HDMI to DVI-I cable adapter.
I first used a Gateway FPD1760. Windows did recognise it but when I used Windowskey+P the monitor stayed in standby mode, even when I chose to extend the displays. The external monitor was there, it just wasn't displaying anything. I then installed a few updates [sliverlight, security essentials and Intel HD3000 update] and lo and behold the monitor came to life and all was well.
After a restart however the monitor again refused to display. In the Intel gfx properties the monitor is recognised as a secondary display. I've tried another Compaq 7020 but that's the same. They both work using the VGA port.
I've tried the function keys like LCD and the change monitor ones but that either changes the built-in monitor's resolution [to the screen ratio of what the external should be 4:3] or it just goes blank. Again the external just stays in standby.
Any advice would be appreciated, thanks.