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17486
June 3rd, 2010 08:00
Dual Monitors On Optiplex 745
We have an Optiplex 745 in our Datacenter upon which I am asked to configure dual monitors. It has an on-board VGA port and a Radeon X1300 card. When a monitor is connected to both ports the pc won't even enter BIOS but displays an error telling us to disconnect on of the monitors. I have changed the Primary Video setting in the BIOS from "Auto" to "On-Board" and back but the error continues. What must be done in order to get both monitors to function?
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DELL-Chris M
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56.9K Posts
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June 3rd, 2010 09:00
What occurs when you power the PC off, disconnect the monitor going to the onboard VGA, connect only a monitor to the X1300, and then power that monitor and the PC on?
dunnerstall
7 Posts
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June 3rd, 2010 09:00
A monitor will function if connected to the X1300.
dunnerstall
7 Posts
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June 4th, 2010 08:00
I have some more information on this. The error message at startup is:
Message = “unsupported Video configuration detected”. Computer has an add-in graphic card, but the monitor cable is plugged into the integrated video connector. To attach the monitor cable to the add-in graphics card:
1. Shut down computer
2. Plug monitor cable into add-iin graphics card
3. Turn on computer
The BIOS i
I believe this pc shipped from Dell with the add-in graphics card. I would expect it to be able to be configured such that dual monitors will work. I would appreciate some information on this.
Thank you in advance.
dunnerstall
7 Posts
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June 4th, 2010 08:00
I intended on including the BIOS version in the previous post.
BIOS 2.3.1 (5-21-07)
DELL-Chris M
Community Manager
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56.9K Posts
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June 7th, 2010 06:00
I would expect it to be able to be configured such that dual monitors will work.
* Nope. For years, the Optiplex line has automatically disabled the onboard video port when an add-in video card is installed. Dual monitors can only be done with an add-in card that has dual ports. The CP309 ATI Radeon HD2400 XT 256MB video card has a DMS-59 connector that requires the use of an adapter cable. The cable provides either two VGA or two DVI connectors.