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What does it mean when the LED blinks and the computer beeps 3 times but won’t boot? Thanks.

Here is the link to the lights flashing. http://support.apple.com/kb/HT2811 And here are the beeps. Good luck. Ralph http://support.apple.com/kb/HT1547

I am having the same issue! I have replaced the memory. tried one slot, then the other. Did the “command, option, r,p” , “shift hold”, and all these like it. i am at a loss as what to do, any ideas from here?

these links dont work