^ Nice one ...I did a similar thing to enable a GBOX to run. Just shows there's more than one way of cracking a nut than just using a big hammer
It doesn't really matter if the PSU is over what the xbox needs. The xbox just uses what it needs, just like a computer that has a 550W PSU when it needs only 350W.
It depends on what revision it is as Microsoft in the later versions to make them more realiable started to fill them with heat transfer compound, used glue guns and epoxy resin to hold components down and generally made the power supply a mess. I've tried to repair two power supplies that have the no power light fault and gave up, firstly removing the 4 screws was easy, but cracking the top open was a bit trickier as the heat transfer compound was effectively acting as glue and I got it open in the end but not without damaging the side of the PSU. Also checking the fuse that is near the power socket revealed that the fuse was 100% and not blown so lead me to believe it was something else and switch mode PSUs are a pain to try and diagnose let alone fix and with the amount of glue and crap holding it together it was likely that I would end up breaking other parts. I'll put up a photo soon.