I recently bought this Motherboard to upgrade my VERY OLD system. The Motherboard is a Gigabyte GA78LMT-USB3. Yes, I know it's not a high performer and it's an older MODEL but i'm not a gamer. This board has 3 display ports but it won't allow me to use the DVI or HDMI by itself. It only works if I use the 15 pin D-Sub as my main display and one of the other as a second monitor. I only need one monitor. Is there a setting that will enable me to use HDMI or DVI by itself or am I stuck with using the 15 pin only?
Specs If it helps: AMD FX6300 Black Edition CPU with 16 GB of G.Skill Ripjaws X Series Ram overclocked at 1600MHz

Thank You
JohnWe want to help you. But few of us know that board by memory
Did you read the manual?
http://www.manualslib.com/manual/409831/Gigabyte-Ga-78lmt-Usb3.html
Check and see if the BIOS lets you set which is monitor #1
Otherwise, you would GO into the Windows display properties and select which port you want to be the first monitor.
See here:
https://support.microsoft.com/en-us/kb/976064
Guided Help: Dual monitor setup is easy in Windows 7!
It is almost the same thing in Windows XP
Yes, you only want one display, but you have to use the dual display tool to select which display is #1.

Does that help?  Bios has no option for this. Using the windows Display Properties works to set whichever Monitor I want as my main but you still need 2 monitors installed in order to do this otherwise I would just pic my Main Monitor up and be done with it. The problem is I don't want 2 Monitors plugged in to my Computer but I wanted My One and Only Monitor to be connected through the HDMI or DVI Port. When I bought this board I didn't even think this would be an issue.

It is almost the same thing in Windows XP
Yes, you only want one display, but you have to use the dual display tool to select which display is #1.
Yes, but you still need 2 Monitors plugged in for you to set it up. Are you saying I need to plug in 2 monitors to set it up then disconnect the I don't want to use? If so and that works then so be it. I just think it's kinda weird on Gigabytes part to have it set this way.

Thanks
John
It is not just Gigabyte. The BIOS if almost nay PC will use the VGA as the default Monitor. In the BIOS look for a place where you can set it to never use the VGA. That is the normal BIOS method of using a second card for the PRIMARY display.

Here are some links about that issue.
http://superuser.com/questions/413804/how-can-i-get-my-system-to-use-dvi-on-boot-bios-when-it-now-uses-vga-on-my-dua

https://forums.geforce.com/default/topic/743319/use-dvi-as-primary-for-bios-otheros-when-2nd-monitor-is-hdmi/?offset=1

http://www.overclockers.com/forums/showthread.php/673422-dual-monitor-setup-BIOS-display-only-on-DVI-and-not-primary-(HDMI)

To find the above links I did a Google on:
force BIOS to use DVI Port as primary
You can try that and get more references.   
Are you making the connection adjustments while the system is on?

If you plug in only the DVI or HDMI and power it on, it should detect and use that monitor without issue.

The BIOS has a "Onboard VGA output connect".

I have Four Gigabyte motherboards and those that I used on-board graphics with I used the DVI connection and never touched the VGA connection, so it's not endemic to Gigabyte boards.Thanks for that info Geek. I'll have to look inti that when i get a break.Thanks BC, and no I've never connected or diconnected a monitor while the system is on. I tried it with just the DVI as well as the HDMI but neither WORKED. I'm going to have to take a closer look at the bios again.
Thanks AgainScreenshot from Gigabyte Manual.


[attachment deleted by admin to conserve space]Sorry Geek but I must be missing something in the screenshot. I read through the manual but I didn't see/read anything pertaining to this. MAYBE I just don't understand. If you could clarify for me I would really appreciate it.

Thanks
JohnSorry I did not explain. I just wanted everybody to see that your motherboard has both VGA and two other kinds of connectors. This means the board itself has two video devices or a dual display video device inboard. With most older motherboards the VGA is the built-in and any DVI is from the add-on card the user has.

So you do not have an add-in video card in a PCI slot? You are using just the video outputs from the back panel of the Gigabyte motherboard. Is that right?
You have a GA78LMT-USB3.
Normally the BIOS on most motherboards wilt  find the attached and make it the default display. But  your Gigabyte  BIOS does not automatically select the only monitor? Is that so?

Another reference:
Quote

GIGABYTE - Motherboard - Socket FM2+ - GA-F2A88XM-D3H (rev. 3.0)
www.gigabyte.com › Motherboard › Socket FM2+
Gigabyte Technology
Supporting multiple independent display outputs simultaneously, AMD Eyefinity ... Flexible graphics capabilities - Up to 2 VGA cards are supported for 2 way AMD ... of the latest AMD Fusion A-series APUs, GIGABYTE motherboards deliver an .... Please use keyword search or select the specific product category to find ..

BIOS automatically determines the primary display port for output, depending on to
which port the display device is connected, D-SUB/DVI-D or D-SUB/HDMI. (Default)

Read page 26. The user can over ride the default.