But firstly I personally never use ECS M'Boards I've had to fix plenty of computers with these M'Boards in them and it seems to be a matter of changing the M'Board till you get one to work and then hope for the best once it goes out the door. I've personally seen several of these M'Boards fail on a [b]Burn In Test.[/b] So unless they are UG at the time that I receive them I try to get the owner to purchase another brand M'Board.
Also I never fit anything into a case till I know that it's working so I bench test everything before I waste my time assembling something only to have to pull it apart when it doesn't work. All that is required here is to fit a CPU some RAM and a Video Card and a Power Supply and then start up the unit by shorting the Start Pins out. If it doesn't work I replace the M'Board with a known good one and try again. Or if I'm working with a unknown M'Board I test with known good components and generally with Base Line CPU's and RAM so I can first thing Flash the BIOS to the latest Available and then try it with the higher end products.
I personally only use Name Brand M'Boards like Gigabyte, ABit, ASUS or the like now days and even now I'm not using too many Gigabyte M'Boards mainly because the main wholesaler who I buy from no longer sells these and the fact that I had some problems with some of the original P4's on these M'Boards didn't help either. Having a 3 week old machine fail and then being told that I would have to wait anything up to 6 weeks to get a replacement M'Board doesn't sit well with me so I stopped using them at that point. Occasionally I'll use Intel M'Boards or Tyan personally I find that the Intel M'Boards are not all that great unless you are looking at a Server Board then they are very good but the Desktop Boards leave a lot to be desired. The Tyan's work a treat but at the upper end of the price market are not for everyone and again they make some excellent Server Boards that if anything are better than the Intel made boards.
But since you are stuck with the ECS M'Board see if they will at the very least Flash the BIOS to the Latest available maybe then you just might have a chance of it working. Depending on who you brought it from it's also possible that you have been sent a returned M'Board that didn't work and they are attempting to get rid of a problem M'Board in the hope that it will work for you. That's something that I've seen many times now with returned faulty M'Boards they pass of something that doesn't work properly because they can and secondly they make the person building the system believe that they don't know what it is that they are doing so when they get one that sort of works they stick to it and hope for the best.
But I would return it now and if you just must have another ECS M'Board keep hitting them till you get one that works and then hit it with one of the Burn In Testers for at least 100 Hours if it works properly for that length of time it's likely to keep working. But before you assemble anything test it out of the case to save you the time & effort of fitting it only to have to remove it latter and repack it to return it.
Col