Hi guys, I have a MacBook that will not boot if the system is on normal setting. It gets to the mac grey apple logo with the gear running and shut off. For a while it ran to the desktop and after 2mins or so it shut off. Finally I was able to do a SMC reset and it leave the fan to run at 100% and it seems to work that way but the fan stay running non-stop that way. If I remove the battery, hold the power button for 5sec and put the laptop back together and get it started. Well the unit will then shutdown unless I do the smc reset were it keeps the cpu fan at 100%. Any idea? I install Mac OsX again on it too just in case.