Cannot get PC to POST

[M16Grenadier]

I have an old Gateway PC that a power supply failed in. Since any other supplies I have do not fit this case, I moved the components to an empty case I have.

Anyway, I hooked everything up (save drives, which I will put in later), and it doesn't even POST! I hear 3 beeps and there is no image on the screen.

Here are the specs as far as I remember:

Slot A / P3 500Mhz
i440BX (Gateway Manufacture)
Riva TNT2 AGP
1x64MB PC100
1x256 PC133@PC100
400 Watt CODEGEN PSU

Any suggestions?

 

[TheRyuu]

Get a new computer?

But seriously, it's pretty old, maby P3 is fried or mobo or something just isn't working.

 

[YOyoYOhowsDAjello]

Clear CMOS
Try running with a single stick of ram (try one, then the other)
Reseat everything

 

[leigh6]

Check online. 3 beeps look like ram error. YOYOYO probably has it right.