20 Most Recent Gigabyte GA-K8NS Ultra nForce3 Socket 939 DDR 400 ATX Motherboard 3-In-1 Combo w/SATA RAID, Dual LAN... (MK8NSU939COMBO) - Page 8 Questions & Answers

Remove all external cards, reset bios to factory settings and try again. If it persists try different memory, if it persists load latest bios, if that fails to cure it it's not worth repairing.

Hi Richie, by virtue of the fact there is nowhere to plug your monitor into this board it's a fair guess that the answer to your question is no.

Check gigabyte site for drivers.

Here: http://www.gigabyte.com/products/product-page.aspx?pid=1655

This a Gigabyte related problem, not Acer. In any case: http://www.acer.com.au/ac/en/AU/content/drivers

Update your Win 7 and apply the fixes/patches.

Check if the MB is really turn ON. Normally is a PSU problem, or a looser cable.

Mark it as solved.

You need to try VGA/DVI connector before HDMI. Only after the correct configuration applied to start from HDMI should solve the problem.

If monitor is fine, and cables too, then is a problem with VGA. If the VGA you're using is build in MB, then it might be that. Try to use a VGA card or another VGA card.

Looks like a looser cable is at fault. Can also be a PSU problem (power supply).

Keep the drivers up-to-date. Check Gigabyte's page for that.

If so, something is wrong. Check all cables, see if they are properly connected and on correct position, and re-try again.

Don't use a wireless keyboard, it might be the cause.