HDMI output not working

[Kakumba]

Ok, I have jsut built an HTPC using an Asus M3A78-EM (780G chipset) motherboard, which has onboard HDMI, VGA, DVI and DisplayPort. I can connect it up fine to my monitor via VGA, but if I connect it to my receiver via HDMI, there is nothing.

VGA to TV does nothing, but I suspect that it is the TV at fault there, laptop VGA - TV doesnt work either.

Full specs:

Asus M3A78-EM
Athlon X2 5000+
2x2Gb G.Skill DDR2-800
Vista Home Premium SP1 64 bit (fully up to date)

Could it be that I need newer drivers? I am not familiar with the AMD/ ATI catalyst drivers, but I am sure there are newer drivers than what came with the motherboard.

So, can anyone help?

 

[Ghouler]

what graphics card do you have?

 

[Roguestar]

Originally posted by: Ghouler
what graphics card do you have?

Read the OP again.

 

[Kakumba]

I could have made that clearer, the video is all onboard, I am not using a dedicated graphics card. Well, just double checked BIOS, nothing in there that would indicate HDMI on/ off. So, I ask again, anyone got an idea?

 

[MichaelD]

There's a possiblity that the MB's HDMI is not synching with the TVs HDMI input. Go into your TVs settings and set the HDMI/digital input resolution to the lowest possible setting. Do the same in MB BIOS if there is such a setting.

 

[Kakumba]

Nothing in BIOS about HDMI, other than a sound option. HDMI is going through the receiver, but will try direct to TV, see if that helps.

 

[Kakumba]

It gets weirder. It looks like the HDMI is not behaving at all, but if I plug in VGA to my monitor, and HDMI to the TV, then the monitor shows the boot sequence, up until windows loads, at which point I lose VGA as well (only when HDMI is plugged in). At this rate, Im going to replace the hardware..