I sure hope it wasn't the psu unit...I guess you will find out real fast...
I have put together 5 ecs mobos now all with 1.4ghz tbirds and have had no issues...I have used 350watt sparkle psu on all of them though...
Do not believe the myth that a 300 watt is fine for all 1.4tbirds and as long as you have just the vid card plugged in and not all the other peripherals you will be fine...That is total crap...If that was the case a 250 or even 200 could start it....THe 1.4 tbird has tremedous amount of draw as well as the ecs mobo is abit more then other boards...You need to look at 2 things on the psu to determin if the out put is enough...
Good Luck...
ECS is quality board...I think most issues have been user related. Yours maybe just a bad board, something all manufacturers have.