imac G4 beeps 3 times upon startup, stays on black screen

Discussion in 'iMac' started by andrejaik, Apr 12, 2015.

  1. andrejaik macrumors newbie

    Apr 11, 2015
    I got a imac G4 , 1.25GHz & 1 GB of ram,

    Upon installing Mac OS 10.5 it was nearly completed when the system crashed and i had no choice but to shut it off holding the power switch.

    Now when i turn it on it beeps 3 times (while the screen is blank) and does nothing.

    Im not sure if its a bad RAM or if i need more RAM? What should i do differently before installing a new OS ?
  2. N2bnfunn macrumors member

    Jul 24, 2011
  3. MacVidCards Suspended

    Nov 17, 2008
    Hollywood, CA
  4. redheeler macrumors 604


    Oct 17, 2014
    3 beeps = bad RAM. Keep in mind that iMac G4s have RAM in two different places: a user accessible slot under the plate on the bottom and a harder to access internal slot inside. Sounds like both of these might have gone bad.
  5. andrejaik thread starter macrumors newbie

    Apr 11, 2015
    Changed Ram

    I changed the RAM, tried the PMU switch, held down many option keys etc and still nothing. although prior to this problem i was installing re-installing iOS 10.5 and at around 99% i get a CPU crash screen, so right there i had no choice but to shut it off using the power button...I thought this possibly started out because i did not format the HD first.

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