falcoy
Level 1 (4 points)

Q: the light on the start button flashes on and off.

Hi

 

My Power Mac will not boot up.However the light on the start button flahes on and off.

At first I thought the disc was dead-but now I am not so sure...

 

Any suggestions anyone?

 

What does the flashing light mean?

 

thanks

Mac pro, Mac OS X (10.6.6)

Posted on May 22, 2013 10:46 AM

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falcoy

Q: the light on the start button flashes on and off.

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  • by BDAqua,Helpful

    BDAqua BDAqua May 22, 2013 3:43 PM in response to falcoy
    Level 10 (123,780 points)
    May 22, 2013 3:43 PM in response to falcoy

    Hello,

     

    Can you count the beeps or flashes?

     

    1 beep = no RAM installed

    2 beeps = incompatible RAM types

    3 beeps = no good banks

    4 beeps = no good boot images in the boot ROM (and/or bad sys config block)

    5 beeps = processor is not usable

     

    In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.

     

    Note: In this case, a flash is considered to be 1/4 second or 250 ms or greater in length.

     

    http://support.apple.com/kb/HT1547