Solved new build PC recognizes only 1 monitor

June 2, 2013 at 10:03:03
Specs: Windows 7, 3.4 Ghz, 8G RAM
I have built a computer with these components:
CPU: Intel Core i5 3570
Motherboard: ASRock Z77 Extreme3 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX
Video card: SAPPHIRE Vapor-X 100358VXL Radeon HD 7770 GHz Edition 1GB 128-bit GDDR5 PCI Express 3.0 x16
Old monitor: Envision 7220
Newer monitor: Asus VH242 Full HD 1080p LCD Monitor
Windows 7
No overclocking, just standard regular PC build

Everything works great - all the components work. Using the old monitor (Envision brand), it works fine.

But when I plug in a newer, larger, HD monitor (Asus brand), it says "No DVI input."

I know the newer monitor works because if I plug it into a Mac Mini it works fine. I've swapped it back & forth and I know the monitor is fine.

I know the PC works because if I use the old non-HD monitor it works fine.

I know the video card works because (using the old monitor) I see the video card in Device Manager and when I update drivers it tells me the driver is up to date.

I know the cables work because I've swapped them back & forth.

I know the power cords and video cables are plugged in firmly because I've taken them out and reseated them many times.

The build has 3 DVI ports (one from the motherboard, 2 from the video card). I've tried plugging in the new monitor in all 3 and all I get is "No DVI input."

I tried plugging the new monitor into the VGA port on the motherboard (using DVI-to-VGA adapter) and then I get "No VGA input."

But when I plug the new monitor into the new PC I only get "No DVI input."

I'm only trying to use one monitor at a time. I'm NOT trying to set up dual monitors. I just want to use the newer monitor with the new build.

I'm stumped - I don't even know the next debugging step.

Any help would be extremely appreciated.

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June 2, 2013 at 11:46:19

Boy do I feel like an idiot. The monitor apparently has several DVI input channels even though there's only one DVI port on the monitor. Using the input select button I was able to rotate through the channels until I find the right one. For some reason the old monitor and the new monitor are on different channels.

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June 2, 2013 at 19:44:50
That probably wouldn't have occurred to me either. Your solution may help others.

DAVEINCAPS - Made with REAL high fructose corn syrup.

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June 3, 2013 at 05:15:09
✔ Best Answer
Glad to hear it is solved. Please select a 'Best Answer' even if it is your own answer. This way it will mark the thread Solved.

You have to be a little bit crazy to keep you from going insane.

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June 3, 2013 at 05:37:56
The forum doesn't allow me to select best answer for my own reply :(

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