No power, Changed Mobo!!

[cncuddid]

Can someone help? I just changed my motherboard v1.0 to another used motherboard(same version), but now the xbox doesn't power up? Thanks

 

[Ahmed]

is the new mobo is a known good mobo?

 

[lxp14]

make sure you hooked everything back up, sounds stupid but it happens

 

[drhunter]

make sure you hooked everything back up, sounds stupid but it happens

Yup, thought I had failed to fix my mobo because it still didn't power on after replacing the power supply switching transistor...
Checked again realised I hadn't plugged the psu into the mobo :|

If the old mobo was dead, did whatever killed it take the power supply with it - or do you know that the psu still works?