Power Box Or Mother Board?

[Addalaide]

 I have an E Machine W3507 it has a Celeron D Processor 2 gigs ram ( upgraded ) ATI Radeon Xpress 200 video. Every thing but the ram is factory.

 My husband had it in a questionable position, and it fell and the power box plug-in shattered. When i found out i opened it up to see if any other pieces had fallen off, nothing looked unusual on the mother board. I took out the power supply to see what the damage was. It was a goner. So i took a good look at the mother board, it isn't cracked and nothing looks fried. A friend suggested a piece feel off that i didn't notice. I replaced the power supply and now the power light and a light on the mother board are the only things that come on. Nothing turns, the fans don't work. Only lights come one.

 Could the mother board of cracked and i just cant see the crack?
 Could i have gotten  bad power supply?
 Could something of fallen off the motherboard that would make it not run?

[jamer123]

you might have cracked the motherboard and cant see it

[honvetops]

You need to take it to someone with  "experience" to thoroughly  check out all the connections from your power supply, make sure the ram modules are seated properly, the cpu/heatsink, and that everything is grounded correctly..ie   motherboard to case.
  good luck

[joevh09]

I would also say that if it fell your hdd probably took some damage and might not be working properly