Ответ на "MacBookPro does not power up on AC power or battery."Hi. I joined iFixit just to be able to do this. My great thanks to Victor Clausson for his help. After many days and hours of grief with my MBP 15 2008, his solution provided results. Before I did his, I tried them all. His 6/13/2011 posting of unplug the battery, unplug the mag..., hold down..., etc. worked. Our MBP 15 2008 is no longer a door stop. Many, many thanks. iGrampa.