|Did you protect the components from static while doing this?|
Not really an easy way to go. Most techs have spare parts to use for tests or advanced tools.
Might see if a pal has a spare psu to test.
Other than that, on a no power issue you can check the on/off button path from switch through the motherboard to the psu or jumper psu to try to start.
If powers up then you may have to remove any pci cards and try to get only the min ram and cpu in to try to do something.
Could it be simple as the monitor is not working or video adapter off in bios or bad?
1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.