Nvidia geforce8400gs256mb/duallink dvi/hdmi

This is more than likely an issue with the monitors themselves. Does this happen on the main monitor is you move the secondary cable over to it? What kind of monitors are you using, how old are they, and do you know the refresh rates on them?

Are you using a Nvidia gfx card? If so, then go into the setup menu (comes with all Nvidia drivers). in the "screen size" menu, there should be a list of the supported screen resolutions. Do remember that the cable you use (HDMI, Display Port, VGA, DVI etc. ), also has an effect on the screen resolution.

No. It is not going to work.
VGA is an Analog signal. HDMI is a digital signal, that is why you need the box, it converts analog to digital.
You can get VGA to DVI and DVI to HDMI convertors because DVI is capable of using both - depending on the type of DVI you have.
What is the difference between DVI and DVI NVIDIA
HDMI Wikipedia the free encyclopedia
Video Graphics Array

Try switching from Monitor 1 to Monitor 2. Or, vise versa. Just switch. in display settings.

The picture quality is High definition. DVI to HDMI cable can convert High definition pictures. Good day.

i have the same problem!
AT5IONT-I, Win7pro,4G, bios 0502

tried many screens, nvidia driver versions etc.

hdmi only works in single monitor configuration. hdmi blanks on detection of dvi monitor. argh!

Good day,

If your screen has a VGA, DVI, or HDMI port, most of the new graphics cards will be compatible with your screen. Most graphics cards come standard with DVI ports and include a vga adapter for the screen cable. Some of the new graphics cards come with HDMI and DVI ports or a HDMI converter if you want to use HDMI.

I would recommend a Nvidia graphics card. Depending on what your primary use is going to be they have an extensive range to cater for your requirements and price range.

Hope this helps!

Regards

you can not use both the on board and external pci-e card. only the pci-e card however you can still use duel monitors by getting a dvi to vga adapter and running the nvidia configuration utility.

Hi, What you have to do is shut down the machine, pull the CMOS battery(CR2032) out and out and put your jumper on pins 1-2 from 2-3. Wait 30 seconds and put the battery back in. After installing the battery, put your jumper back to pins 2-3 from 1-2. This should work.

make sure the cables are tight if they are i would look at replacing the video card.