Without going too in depth to the original problem, I had the backlight of my Macbook die a few weeks ago, and I opened it up to try and see what the problem was. I knew where I was looking after some Googling, so I didn't prod around too much. The inverter cable seemed dodgy and the screen would flicker when moving it, so I established that was the problem. I ordered a new inverter cable, which has just arrived. I installed it and with fingers crossed, pressed the power button - nothing. No chime, no noise. It doesn't power on. It was powering on fine when we had it apart and testing for the backlight problem and we haven't touched it since then. I can't see any visible signs of damage, the board isn't fried and there are no cables melted or damaged. The Macbook is a late 2006 Core Duo model (I know, it's old, but I can't afford a new one and really need to save this) Does anyone have any advice? Much appreciated.