Hello, I've run into a brick wall with attempting to fix this G5. When I got it originally the radiator was leaking pretty bad, but by some miracle there was no damage to the CPUs or logic board. I ordered a replacement radiator from eBay, put new o-rings in it and booted the system up. It ran perfectly, detecting both the CPUs with no problems other than Temperature Monitor reporting -30C for the first processor. I left it on for about twenty minutes and it ended up freezing. I could still see temperature monitor and the temperature of the second CPU was only ~ 42C. So I turned it off by holding the power button, and then it wouldn't boot afterwards. Solid white power LED on the front and no red LEDs on inside. No chime or video output. So I opened it up again and reset the PMU. But now--where I'm stuck at--it still won't boot, but now there's no solid white LED on the front. It only comes on when I push the power button. This has happened before, and I resolved it by taking out the PRAM battery for ten minutes. But no dice this time, it simply refuses boot or show a white light in the front. Does anyone have any idea what the issue might be?