hello all, , thank reading problem. have old 2008 macbook. ran fine, no problems, thing tank. use phd dissertation. last week installed yosemite on it, , starts fine first boot up, work done , go sleep. typical night (other putting new os on). next morning, won't start. @ all. when power button pressed lights second, optical drive makes bzzzt (typical start noise) fans start second , heard hard disk , shuts down. nothing screen @ all. if hold down button, lasts 4 seconds before front light blinks , computer goes dead again. i've tried various combinations battery or ac power, used hotkeys (pram reset, assuming on long enough register), , waited several days battery go down bit. nothing, refuses start , have no idea why. nothing has happened it, no drops, no water, no nothing @ between time working fine, , next day not work. charge light , battery both green , no problem there. took out , reinserted memory in case well. ...
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