Hi, I'm new here, but I'm not so new with Intel hardware from the last ten years.
I'm used to Pentium II, III processors and mainboards, but I've just put together my first mini-ITX board (DQ45EK) and a Core 2 Quad (Q8400S).
Power-on for the first time with no monitor (more later) resulted in a power-down after 10 seconds or so. With no memory, I got the usual 3 beeps - so this tells me my memory is probably okay.
I bought a DVI-A to VGA adapter, which damaged the motherboard connector ever so slightly, took it back to the shop where they forced it on to a female adapter which bent the blade on the DVI-A enough to make it sit nicely in the motherboard connector now (and I have had monitor output now a few times, but not any more - I've tried tilting the connect up and down ever so slightly and still get nothing).
Before the shop bent the adapter, I'd ordered a DVI-I to VGA adapter (online) but they sent a DVI-D to VGA, which won't work even though I've got an LCD monitor (Googling shows sometimes this works if there's an analogue to digital adapter after the VGA in and before the LCD - but alas, it doesn't work for me). I asked them to send a DVI-I to VGA replacement but I don't think it'll help as I've now had some output using the DVI-A to VGA adapter from the shop.
I *finally* got display output, which reported my processor was unsupported. However, I've checked the online help and DQ45EK only supports one Q8400S processor, so I can't see that I've got the wrong one of two (for example - this was someone else's problem on another forum). But having removed the processor to check it's an SLGT7 (there's actually nothing I can see on the processor, through the thinning processor heat compound), now the motherboard powers-up, but doesn't power-down, and now, no longer requests a DHCP address and my DHCP server doesn't reveal it's MAC address. I was getting 'unsupported processor' without my (and before I replaced my) CMOS battery.
Since I first got display output, I've done no 'fiddling' with my DVI connector, I've tried remounting the motherboard on it's insulation legs provided with the T1200 chassis (although the base plate of the chassis is insulated anyway), I've tried taking the memory out again (and get the 3 beeps), and I've tried removing the CMOS battery. I'm running with just CPU (Q8400S), CPU fan (Akasa low profile), DIMMs (2x2GB DDR2 non-ECC - I've heard that x16 factor doesn't work with this motherboard and I have two rows of 8 which doesn't necessarily apparently mean x16 - Crucial recommend the memory I'm using, for this board and don't sell any other 2GB modules at non-ECC DDR 887 - Intel literature even says the board supports 8GB which I think is wrong - I'm only using 2x2GB), onboard video,
Can anyone give me any clues, I suspect along the lines of "try a lower Core 2 Duo processor" and reload the BIOS. Unlike my Pentium II, III days, I have no similar hardware so I'll have to go out and buy/order stuff . I was hoping that my first steps into mini-ITX land (having done quite a bit of research on compatible components) would have got off to a more successful start...
Thanks for reading this post, Alex.