Display dont work after upgrade

[_deadshot]

Hey guys its me again,

Previous config
Core2Quad Q8400 @ 2.66GHZ
2GB Transcend RAM
ANTEC 550w
660 Oc edition
Intel G41 Mobo

As you guys suggested i bought an i5 3330 , Kingston 4GBx2 RAM , & Gigabyte h61m-s1
I know the mobo is cheap but not trash

So my engineer assembed the parts into my cabinet...but the boot wont happen...no display or beep sound...Fans run at full speed

Things we tried
Using the Onboard Graphics VGA
Using my 660 Oc Edition
Changed the RAM (used the extra one he had)
Used single RAM at a time

But the display wont fire up, we also tried breadboarding

He tried everything, he even called his colleagues , but no luck...finally he took back & said he'll return after few days...but i wanted to know whats the query...i searched the forum but the solutions mentioned didnt worked like Faulty RAM, low Voltage ,etc

While my previous mobo works flawlessly as i am typing right now

 

[RobCrezz]

Sounds like you tried the obvious things. Sounds like DOA mobo.

 

[_deadshot]

What is DOA

 

[RobCrezz]

What is DOA

Dead On Arrival.

 

[_deadshot]

Then how did the fans work ? i mean correct me if am wrong...if mobo doesnt works shouldnt the processor fan stop ?