|I don't know what you mean by ". . . the sound of the fan three times and then|
t(h)ree beeps". If the fans and drives are spinning up, that's not an error.
If you moved it and fiddled around inside then you need to make sure everything is correctly and tightly connected and the cards firmly inserted. Do that with the power cord removed as the PSU provides a small charge to the motherboard even when the system is off.
As I mentioned above, you need to check the beep code for the motherboard. That should be in the motherboard or system manual. And 'wmta 2074-60002' isn't the model number.