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will not boot

  1. M

    MacBook Pro Won't Boot Up

    I have a MacBook Pro 17" 2011 with High Sierra OS. I recently changed the battery. Was working great for months. Now it won't boot. When I turn it on, I get the following screen: When I press a key, it starts booting up, it goes almost to 40%, and then it boots again and does the same...
  2. U

    MacBook Air will not turn on

    My MacBook Air model A1369 will not turn on. - ihave attempted the reset procedures with no effect. -no fan noise, lights, or any other sign that the power might be on and the display bad. - The power supply shows Green. After a few days of no use it shows orange and quickly charges showing...
    • Uilliam
    • Thread
    • a1369 deep sleep macbook reset service manual troubleshoot will not boot will not start will not turn on
    • Replies: 2
    • Forum: MacBook Air
  3. B

    G5 Will Not Start After Crash-Please Help, Desperate.

    I have a PPC G5 1.8 DP (PCI) running 10.5.8 that has begun to crash randomly. When I try to restart, it will boot up to the Apple screen and then click off again. Rarely, I can get it to restart, occasionally I can get it to boot in Safe Mode and I can always get it to boot in Slave Mode. If...
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