Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: ddrake on May 28, 2012, 11:09:08 am

Title: Radeon 9800 will only work with 2 monitors attached -- Help needed
Post by: ddrake on May 28, 2012, 11:09:08 am

In my cab I have a new Samsung 26" LCD TV fed by a Radeon 9800 and am running the Catalyst driver and control center.

I had the computer hooked up to a 19" monitor while building it and then attached the 26" LCD by a DVI to component cable. Testing with 2 heads.

I've made the LCD TV the primary video and configured the PC to not feed any video to the 19" monitor.  The LCD runs fine as long as the monitor is hooked up, but once I disconnect the monitor, the next time I power the machine up it won't feed video to the LCD. It'll even work fine with the monitor plugged into the video card but not plugged into the power strip.

Obviously, I'd prefer not to have to have the monitor hooked up just to be able to use the LCD.

Any help would be appreciated.

Title: Re: Radeon 9800 will only work with 2 monitors attached -- Help needed
Post by: lilshawn on May 28, 2012, 07:38:57 pm

videocards have a routine at startup that detects what's connected to see if their is actually a monitor present. by converting the DVI to component you are removing the detection capability.

you could always get a DVI to HDMI cable/convertor. DVI is basically HDMI without the audio. the TV will be properly detected at startup.