Cant use my HDTV as sole monitor via HDMI

[ShahJahan]

Hello.

My specs:
CPU: AMD Phenom II x2 560 (unlocked to x4)
Motherboard: Gigabyte GA-880GM-D2H http://www.gigabyte.com/products/product-page.aspx?pid=3515#ov
RAM: 4GB 1600MHz
Monitor: Toshiba 24HV10E 24" HDTV http://www.toshiba.com.my/product/product_details.jsp?productid=24HV10E

I have a Toshiba 24HV10E 24" HDTV and I wish to use it as my sole monitor using HDMI. My motherboard has an HDMI port with integrated HD 4250 graphics. When I use the VGA monitor, I get the display BUT when using HDMI then I don't. I tried using the VGA monitor and then extended the desktop and that didn't work. The only option that worked was duplicate the desktop. But then it works to the maximum resolution of the VGA monitor of 1280x1024.

After setting duplicate, I thought that now since it's working, I removed the VGA monitor. But then the HDMI doesn't work. But if I connect the VGA along with HDMI then it works. But it only works WHEN windows has loaded. That is it doesn't show the BIOS, POSTing and loading windows screen. It starts with the welcome screen. But the VGA shows everything.

I tried running the HDTV before booting the system. Running the monitor AFTER the system has completed booting. Unpluging and replugging the HDMI cable. But still can't use the HDTV as a sole monitor. I works only alongside with VGA monitor and only in duplicate desktop settings with max 1280x1024 resolution.

Kindly help with a solution.

 

[KingFatty]

Check the BIOS settings of your motherboard.

Look for various different settings under different categories. I have ASUS so it's different than your motherboard, but there is a BIOS setting that might cause this behavior.

The reason I think it's a BIOS configuration is because your display is not coming up during boot up or other steps before you get into windows, and I think once you are in windows, then windows is able to take some control over the hardware.

So, can you find the BIOS settings that control the behavior of your integrated 4250? My mobo has a setting in the section for overclocking, and it also has more settings under two more sections, such as the chipset section and the, ah, bootup or something section.

You may have to change a setting in BIOS to something that is counterintuitive, such as changing the surround view from AUTO to disable or enable etc.

But, play around with the different settings, and see if when you boot up you see both displays being supported under BIOS before you get to windows.