Power mac g5 wont turn on

I have a power mac g5 dual cpu i got from my dad i stated to recover him. Issue in begginig was the graphic card broken

So i got a new grafic card after i placed new grafic card the g5. I tried to startup the g5 and nothing. Press the power on button a white light will go on while i press and the mac gives a dry click the fans rotate 1sec and stop no movemnet.

I changed the battery, i got a new 600w power supply, reset the smuand all the same nothing changes can anybody help me on whts goingon?

Or whtis the issue?

Help pls