I have a G4 733MHz Quicksilver here. This is the problem. I press the power button the light flashes, the fans spin, and nothing. Repeat and still.....nothing. I checked to see if all the components were seated, ram, logicboard, video card. Tried again and............ nothing. I reset the PMU aaaannnnd...... Nothing. Checked over everything and noticed that the little red LED on the board is not illuminating. However there is power running through the board because the power button light is comming on, fans are spinning up. However it will not fully come on. I also changed out the logicboard. And that wasn't the issue. So does anyone know what I have going on here. This is killing me, cause I have given myself a headache trying to figure this out. Please send me a reply or email me, something please.......