this happened because a screw from motherboard got loose and was lying beneath the powersupply
i didnt modify it, my friend did he's most likely a noob..

now my question is:
where to get a new (official) powersupply .. (the universal powersupply s.ck and are known for little errors)
OR
how to fix this, coz i've seen somewhere you can repair this i'm not sure though.
AND
could this fatal error have caused anymore damage to the rest of the xbox?
thank you ,
stoner