TS2570: Mac OS X: Gray screen appears during startup

Learn about Mac OS X: Gray screen appears during startup
Kyleky1

Q: MY MAC BOOK PRO SCREEN WONT TURN ON AND WHEN I START IT UP THE INDERCADER LIGHT FLASHES

Help my macbook pro will not turn on i am using leopard and my keyboard will and my computer will but the screen wontand wheni start it up the light on the right of the computer at the front starts blinking

MacBook Pro

Posted on Apr 4, 2014 8:37 PM

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Q: MY MAC BOOK PRO SCREEN WONT TURN ON AND WHEN I START IT UP THE INDERCADER LIGHT FLASHES

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  • by BDAqua,

    BDAqua BDAqua Apr 5, 2014 10:56 AM in response to Kyleky1
    Level 10 (123,618 points)
    Apr 5, 2014 10:56 AM in response to Kyleky1

    Hello, see if this helps...

     

    The following table lists the new tones and their meaning:

     

    Tone(s)    Description

    1 tone, a 5-second pause, repeat    No RAM installed

    3 successive tones, a 5-second pause, 3 successive tones    RAM does not pass data integrity check

    1 long tone when holding down the power button    Firmware upgrade in process. See About firmware updates for Intel-based Macs for more details.

    3 long tones, 3 short tones, 3 long tones    Firmware restoration from CD in process. See About the Firmware Restoration CD (Intel-based Macs) for more details.

     

    http://support.apple.com/kb/HT2538

     

    Older meanings...

     

    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