Help!!! cMP4,1 won't boot.

Discussion in 'Mac Pro' started by theone29, Jan 10, 2019.

  1. theone29 macrumors member

    theone29

    Joined:
    May 6, 2013
    #1
    Hi,
    I have a 4,1 here that won't boot, powered on but then nothing on the screen. RAM light is not on, no beep or indicators. I tried resetting SMC, PRAM but there are no chime or sound coming from the internal speaker, visually checked the motherboard and cables connection, all seems to be good. Any suggestions, please. Thank you.
    Specs: Single hex 3.3ghz, 12gb Ram, Dual 1TB HDD, flashed GTX 680.
     
  2. JedNZ macrumors 6502

    JedNZ

    Joined:
    Dec 6, 2015
    Location:
    Deep South
    #2
    Maybe replace the PRAM battery, the CR2032 or BR2032 I believe.
     
  3. bsbeamer macrumors 65816

    Joined:
    Sep 19, 2012
    #3
    What OS version?
    Dual 1TB HDD in RAID for startup disk?
     
  4. theone29 thread starter macrumors member

    theone29

    Joined:
    May 6, 2013
    #4
    I'm going to grab a new CR2032 today. Regular set up on the HDD, I was going to install HS, update the FW to 5,1 then Mojave but I couldn't even boot to Recovery or Disk Option.
     
  5. bsbeamer macrumors 65816

    Joined:
    Sep 19, 2012
    #5
    Some people report needing to reset PRAM several times. Try a few times if it does not work immediately after battery replacement. BR2032 is the OEM part, but CR2032's do work (do not last as long).
     
  6. JedNZ macrumors 6502

    JedNZ

    Joined:
    Dec 6, 2015
    Location:
    Deep South
    #6
    I had an issue a year ago, and I finally resolved it by doing an SRC reset (Shutdown cMP - unplug power cord - wait 20 seconds, plus power cord back in - wait 10 seconds - power up), and then did a restart but held the power button down as if I was doing a firmware upgrade (I wasn't) - it made a bong noise and I then pressed the power button again which shut it down. I then powered back up and the problem went away. To me it kind of made it check itself. Might have all been in my head, but haven't had an issue since.
     

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