On my new X2/gaming build, I couldn't get going anywhere as my ASUS ve248h 23" monitor didn't get any signal when using HDMI as well as DVI.....(of course, both were never plugged in at the same time). 

I tried to toggle between input selections on the Asus (VGA, DVI, HDMI etc...) to no avail. I have the HDMI cable plugged into my video card (HIS Ice q 7870) and I always power on the ASUS monitor before the PC.

The fan on video card is working, both power cables to the video are plugged into the PSU, and my PC seems to be working (I just can't get past the "No Signal" to see anything in BIOS).

Motherboard: AsRock Z77 OC Formula
Video Card: HIS Ice Q 7870
CPU: i7 3770k
RAM: G.Skill Ripjaws X 16GB
PSU: OCZ 850W Gold
Monitor: ASUS VE248H 23"

If you need any other info, I'd be glad to provide it....(the only other two components I've installed are the SSD and DVD burner).

I'm totally at a loss as to what else I can try. I'm hoping one of you can please help me troubleshoot this out.....sucks having this new build just sitting and waiting with no place to go....

Check the boot codes (Dr. Debug) and "POST status checker".
 
Remove the graphics card from your system, and connect your monitor's HDMI input to the back panel HDMI port on the motherboard. This should at least get you into the UEFI BIOS if the board will boot far enough to initialize the integrated gpu and display logic in the cpu and chipset. If your system still won't boot into the BIOS then something else is wrong (see Dr. Debug and POST checker).
 
To enable the igp and onboard HDMI to operate alongside an installed gfx card you may need to allocate shared memory to it in the BIOS, otherwise the onboard HDMI will be automatically disabled when a discrete gfx card is installed.
 
You may want to check for and install any updated BIOS at this point if not done already.
 
Once you have the onboard HDMI set up, then install your HIS gfx card again and connect it to your monitor's DVI input. This should allow you to switch between viewing the mirrored HDMI (onboard gfx) and DVI (HIS gfx card) displays for further troubleshooting.
 

Goddard
Check the boot codes (Dr. Debug) and "POST status checker".
 
Remove the graphics card from your system, and connect your monitor's HDMI input to the back panel HDMI port on the motherboard. This should at least get you into the UEFI BIOS if the board will boot far enough to initialize the integrated gpu and display logic in the cpu and chipset. If your system still won't boot into the BIOS then something else is wrong (see Dr. Debug and POST checker).
 
To enable the igp and onboard HDMI to operate alongside an installed gfx card you may need to allocate shared memory to it in the BIOS, otherwise the onboard HDMI will be automatically disabled when a discrete gfx card is installed.
 
You may want to check for and install any updated BIOS at this point if not done already.
 
Once you have the onboard HDMI set up, then install your HIS gfx card again and connect it to your monitor's DVI input. This should allow you to switch between viewing the mirrored HDMI (onboard gfx) and DVI (HIS gfx card) displays for further troubleshooting.
 

Thanks so much for the reply Goddard. I'll do the above once I get home tonight. (I completely forgot about checking Dr. Debug......DUH!!). So glad I posted this here.... :))
 

As noted, if you remove the PCIe Video Card, you can use the internal Intel Video in the i7 CPU.  Unless you have changed the BIOS setup it will automatically detect whether a video card is plugged in.  If not, it will default to the internal i7 CPU graphics.  If there is a video card it will detect and use it.  Reset the BIOS either with the BIOS reset switch on the motherboard or by removing the CMOS (BIOS) backup battery for about 5 minutes.   When you first power on, and until Windows loads the video driver, the video will default to the basic VGA mode. 
 
Are there any POST error codes on the motherboard display?  I had an ASRock Z77 motherboard and it had a two digit LED display that would show any error codes.

Good news & bad news.....
 
I plugged in the HDMI into the MB and installed Win 8 without any POST code errors or red lights indicating there's a problem. However, I also tried using the HIS card in all 3 slots and couldn't get it to work/repond in any of them. The post error codes were different on each slot and remember A6 being one of them. 
 
Do you think the video card is defective? I tried to have the HDMI plugged into the MB and the DVI plugged into the HIS card, but both didn't get any signal (the HDMI only worked on the MB when nothing else was plugged in). 
Are there any other things I should test before returning it for a replacement?

Could also be a problem with the motherboard.  Do you have any other PCIe cards installed?  Or can you try that video card in a different PC.  That will tell you whether its the video card or the motherboard. 
 
I had problems with a new ASRock Z77 Professional (Fatal1ty) motherboard.  Two out of the four memory slots were bad from the start.  ASRock replaced it under warranty.
 
If its the motherboard, about the only other thing would be to flash the BIOS to the latest version. 
 
 

fireberd
Could also be a problem with the motherboard.  Do you have any other PCIe cards installed?  Or can you try that video card in a different PC.  That will tell you whether its the video card or the motherboard. 
 
I had problems with a new ASRock Z77 Professional (Fatal1ty) motherboard.  Two out of the four memory slots were bad from the start.  ASRock replaced it under warranty.
 
If its the motherboard, about the only other thing would be to flash the BIOS to the latest version. 
 
 

I don't have any PCIe cards installed. I do have another PC (see my sig), but I'm not sure if my PSU in that can handle this video card (I'll open it up and see what the wattage is like).
I was going to try the graphics card from my old PC in the new build and see if that works....I'm hoping the PCIe slots are ok on the MB....
 
Will it POST an error on the MB if there isn't anything plugged in the PCIe slot or does something need to be plugged in?

It shouldn't POST an error if nothing is plugged in, unless there is a hardware problem with the PCIe bus.  If you are getting an error code with nothing plugged into the PCIe bus that pretty much says there is a problem with the motherboard.
 
After I got the replacement ASRock motherboard, I was using it with just the built Intel i5 3550 CPU graphics.  There was no error code, with no PCIeX16 video card installed.
 
The A6 error code is the same as my ASRock board.  A6 is "SCSI Detect" and should not have anything to do with the PCIe bus.

No, I'm not getting any errors when there's nothing plugged in the PCIe slot. I'll repost my findings after installing my old graphics card and see what happens.....
Thanks Jack for all the advice, I appreciate it. :) 

The old graphics card worked in all the PCIe slots and when re-installing the new (HIS) card, no luck.....I'm returning it for a replacement.
 
Thank you for all your help/tips Jack & Goddard!!! :))