Thanks m8xpayne, the rest who aren't helping, hope you kill yourself.
m8Xpayne: I think the problem is… you have to make sure the PC Case Panel connectors are connected to the motherboard.
Otherwise you'd have to find the Power up switch on your motherboard. Provided that it comes with that switch.
Watch the CPU fan, if it turn a 1/4 turn then stops. You have something the power supply does not like. UNPLUG the power supply, new ones will not start if a short is detected unless you pull the main plug. Pull all cards out, only I memory chip, unplug CD, floppy (?), and anything else but the 2 motherboard plugs. If it starts, start adding. Bad CD that is shorted will stop the power supply.
Power supply. Google "check PC power supply". Pull all other plugs (mother board too) and follow the directions on how to use a wire to short two plugs. If the power supply fan spins, that works. You can keep it in the computer.
From no clues of what "new computer" or "old case" or "power it up" might include, here are some choices:
An inverter from your car's battery might provide AC current for a computer.
A bicycle powered generator could run it, and you would get exercise as well.
Solar panel system and converter, storage battery is another choice.
Do you have sufficient wind power or a flowing creek there? Could do a windmill or a water wheel generator system.
Just some guesses from your information.
i think the problem is……… you have to make sure the pc case panel connectors are connected to the motherboard…
otherwise you'd have to find the power up switch on your motherboard… provided that it comes with that switch…
Need more details. Check PSU & power cables
Plug in. Turn on. There, I've given you as much info as you gave us.SMFH!
Put a PSU into it, wire it sensibly and properly, plug it in.
if you have to ask i dont believe you built it at all
You do have a on and off switch.
that is a very subjective question