Hi all, I have a white MacBook, about 4 years old, Intel Core 2 Duo. It won't boot up, despite having tried all the steps I've come across on Apple Support, then other potential fixes on various forums. Here's the story: 1) To begin with, it wouldn't boot past the blue screen. I'd get the chime, the apple logo, the spinning wheel, then it would start alternating between the grey screen with the spinning gear and the blue screen with nothing. 2) So I tried a safe boot (waited a long time, but nothing hapened) 3) I tried Verbose mode and got this message: Firewire (OHCI) Lucent ID 5811 built-in: handleARxReqInt-ARx Request packet error, status=0xe00002c7 alternating with: Firewire (OHCI) Lucent ID 5811 built-in: handleARxResInt-ARx Response packet error, status=0xe00002bc (my bold) - this message just ran and ran 4) I tried all the other steps suggested by apple support on this page: http://support.apple.com/kb/TS2570 5) After having done the NVRAM/PRAM reset, after the chime, it would only go to a blank grey screen - no apple logo, no spinning gear nothing 6) So I tried putting in the install disc that came with my MacBook and booting with 'C'. The chime would be followed by the sound of the disc spinning but nothing would happen, and after about a minute the disc would stop spinning. Just blank grey screen all the time. 7) I tried removing the battery and the hard drive, to force it to boot from the install disc - same results as above. This is where I'm at now - I can't eject the disc (which is undamaged, by the way) and I'm at a loss what to try next. I've tried putting the HD back in and the battery. Same old. Any ideas on what else I can do before I give up and take it to Apple (not so easy from where I'm living)? Also, what do you think the chances are of my files surviving on my hard drive? How can I try to access them - on another Mac with the same/similar OS (mine is/was OS 10.5.4) Thanks in advance for reading this and any help you can give!