New build pc - no monitor signal


The spec of my new pc:

Processor: Intel CPU i7 875K OC Quad Core Processor
Mobo: Gigabyte GA-P55A-UD7
Graphics: Asus NVIDIA GTX 480
Hard Drive: 120GB SSD OCZ Technology Vertex 2 Solid State Drive
Case: Coolermaster case Cosmos 1000
PSU: Coolermaster 1000 W Silent Pro Gold
RAM: G-Skill 4GB Ripjaws DDR3 PC12800-1600Mhz Cas7 Kit
CPU cooler: Thermalright MUX-120
PCI Wireless card: EDIMAX EW-7728In
DVD drive: LG GH22LS50

I've just spent the weekend putting it together. The problem is, when I turn it on, I get no signal on my monitor. I know the monitor and HDMI cable works as I use it for my laptop.

I suspect it is the gfx card that is having problems, although I'm just guessing. I've tried it in both PCIEX16 slots and still no signal. Tried it with an HDMI cable with HDMI>mini HDMI adapter as well as HDMI>DVI adapter.

The motherboard has a debug LED which shows various hexadecimal values, eventually ending on FF, which the mobo manual says is "Boot attempt (INT 19h). I just stays on this and the various other LEDs on the mobo (such as the phase LEDs) go out.

Any ideas? Is my gfx card knackered? Is my mobo error code trying to tell me something else?

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More about build monitor signal
  1. Sorted, the gfx card wasn't in the slot properly.
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