OK did it do anything like blink any light when you turned it on. Another thing that you can try is that to take it apart again and unplug the little battery on the mother board. leave it that way for about 30 mins. And then do the ps3 system recovery. Hold the ps3 power button for two beeps right in a row, so it will be like beep (it turns on) another one beep reset video settings, and then the it will be beep beep and that is the safe mode. and see if you get video it that way and we will know if it is the ps3 or not.
Thanks and let me know what happens and i will assest you with this. I downgraded a ps3 that had the same problem and fixed it. Thanks.
I almost think that it is not needing a reball. Is it a slim or a phat.