Take everything out of the case. Set motherboard on a cardboard box and only plug in basic components such as power supply, hard drive, and video card. Also install a minimal amount of RAM (1GB is fine). Then turn it on. If you do not know how to turn on a PC without a switch then take a screw driver and touch the two pins (at the same time) on the motherboard that is for power. Post the results.
i had the exact same issue.
What i did, is on the back of the PSU, there is a switch. I have my switch set to the dash line, and not the circle. If i change it to the circle, I get a split second boot and the thing just turns off.
You might have already tried this, but oh well. Just a suggestion.
I'll add a fourth request for you to list your complete system specs. Does it help if I say PLEASE? If you're not willing to answer questions asked of you we're not really going to be able to help.
I highly doubt you've actually performed every step in both of the linked troubleshooting guides. They were created to troubleshoot this exact type of problem, but you have to perform EVERY step in order for them to work. It seems like you may have already answered your own question, though. If a different motherboard solved the problem then it looks like your motherboard is faulty.
It's possible, but you haven't given us detailed enough specs to tell you for sure. What EXACT RAM kit do you have? "Kingson 8gb" doesn't give us enough information. We need the exact model number of your RAM. The max RAM voltage supported by Intel chips is 1.65v. Many Kingston kits require more voltage than that. That will cause stability issues, but not really cause the type of problem you're having.
What power supply do you have? A cheap PSU will also cause all sorts of issues.
Of course we're kind of wasting our time on this since you said the system worked with a different motherboard. If that's really the case then the problem is obviously your motherboard.