My Mac Desktop will not turn on just beeps

We lost power and now my MAC destop wont turn on just beeps when I hit the power button HELP

Here's a list of error tones:
http://support.apple.com/kb/HT2538
..but you might want to try an SMC and PRAM reset:
https://discussions.apple.com/docs/DOC-3603

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    My mac desktop will not provide sound from internal speakers.  When I go to audio devices window it only shows airplay.  How can I get internal speakers back.

    There are many possible causes for this issue. Take each of the following steps that you haven't already tried. Some may not apply to your model. Back up all data before making any changes.
    1. Start with the steps recommended in this support article. Don't skip any of the steps. It's the starting point for further efforts to solve the problem.
    2. Run Software Update and make sure you have a fully up-to-date installation of OS X.
    3. If you've installed an application called "Memory Clean" or any other third-party software that is supposed to "clean" or "purge" memory automatically, remove it according to the developer's instructions and restart. You should do that even if the software is not causing the problem, because it's useless.
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    6. Launch the application "Audio MIDI Setup" by entering the first few letters of its name in a Spotlight search and selecting it in the results (it should be at the top.) Select Built-in Output from the list on the left. If the Mute boxes are checked, uncheck them.
    7. If a red light is visible in the audio-out port when sound should be playing, the internal switch is stuck in the position for digital output. You may be able to free it by inserting and removing a mini-stereo jack of the proper size. Inserting any kind of tool in the port may cause damage that won't be covered by your warranty.
    If there's no red light, the switch may still be stuck in the headphone position. Try to free it the same way.
    8. Disconnect all wired peripherals except keyboard and mouse, if applicable. If more than one display is connected, disconnect all extra ones. Restart and test.
    9. If you have a MacBook Air, turn off Bluetooth and restart.
    10. Start up in safe mode. Don't log in; just restart as usual when the login screen appears. When you do, make sure the words "Safe Boot" do not appear in the login screen. If they do, the system is still in safe mode and sound won't work.
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    12. Reset the SMC.
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              Services ▹ Reveal in Finder (or just Reveal)
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    *If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination  command-C. In the Finder, select
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    14. Reinstall OS X after backing up all data.
    15. Make a "Genius" appointment at an Apple Store.

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    My Mac book will not turn on no matter what I do help

    This is might help:
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    I had given up on finding a solution until i found your video. It's just a miracle!!!    
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  • My Power Mac G5 Will Not Turn ON

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    Same thing happened to my G5 dual (late 2004 model). Just did a quick search to find out "power supply unit failure" is most likely the cause.
    Here are some useful links:
    This guy replaced the PSU and documented the process:
    http://damntechnology.blogspot.com/2009/02/rebuilding-powermac-g5-power-supply.h tml
    Taking out the heat sinks to get to the PSU is a challenge. This link shows how:
    http://forums.techpowerup.com/showthread.php?p=1476640#post1476640
    This repair shop in Fremont CA seems to have pretty reasonable price to do the repair:
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  • 16 mo young Mac Pro will not turn on. Dead. Why. No problems ever! Installed Yosemite and did not boot up after. Did that kill it? To young to die. What

    16 mo young Mac Pro will not turn on. Dead. Why. No problems ever! Installed Yosemite and did not boot up after. Did that kill it? To young to die. What happened?what do I do now??????? Help!

    Note that you don't have a Mac Pro as stated. Your profile says you have a MacBook Pro. Please clarify as they are entirely different computers. If nothing below works for you, then make a Genius Appointment and take it in for service.
    Try these in order testing your system after each to see if it's back to normal:
    1. a. Resetting your Mac's PRAM and NVRAM
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    2. Restart the computer in Safe Mode, then restart again, normally. If this doesn't help, then:
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  • My iphone 4 will not turn on just keep getting log screen

    my iphone 4 will not turn on just keep geting logo on screen

    Hi,
    Try a Reset of the Phone... You will Not Lose Any Data...
    Turn the Phone Off... ( if not already )
    Press and Hold the Sleep/Wake Button and the Home Button at the Same Time...
    The Apple logo will Appear and then Disappear...
    Usually takes about 10 - 15 Seconds...
    Turn the Phone On...
    If that does not help... See Here:
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    my new mac desktop will not recognize samsung yp-t9j
    what do i do?

    Reset the SMC and the PRAM on the iMac and retest.

  • My phone will not turn on just has the apple logo on it what can i do ?

    My phone will not turn off or on just has the apple logo on it

    Click here and follow the instructions.
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  • HT1338 White Mac book will not start up just shows gray screen with apple logo

    White Mac book will not boot up gray screen only

    There are some recovery steps for this condition outlined in the below article.
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    My MacBook will not turn on? Plugged in or without power cord attached.   Charged all night.  No previous problems?

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  • Water spilt on Mac Pro will not turn on

    A Glass of ice water spilt in key board. Turned off to let dry and then would not turn on again.. What can be done to salvage mac ?

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    All affected parts must be removed from the laptop and carefully and closely inspected. Any involved area should be marked for special treatment.
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  • My Mac desktop will not reboot?

    I shut down my iMac and it will not reboot correctly.  I power it on and it will sit for hours with the apple logo in the middle of the screen with the small rotating circle underneath which makes it look like it is thinking.

    Hello,
    Could be many things, we should start with this...
    "Try Disk Utility
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    Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
    (Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
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    If 10.7.0 or later...
    Bootup holding CMD+r, or the Option/alt key to boot from the Restore partitirion & use Disk Utility from there to Repair the Disk, then Repair Permissions.

  • My mac will not start, it just beeps and screen will not come on

    The on light pulses but it will not boot up it continuosly beeps

    Welcome to Apple Support Communities
    Beeps indicate a hardware problem, probably referred to RAM. How do you hear the beeps? > http://support.apple.com/kb/HT2538

  • HT4628 My Mac book will not turn on after I restarted it, in a new wifi area??

    Help

    Troubleshooting: My computer won't turn on
    http://support.apple.com/kb/TS1367
    Things to Do If Your MacBook Does Not Turn On
    http://news.softpedia.com/news/Things-to-Do-if-Your-MacBook-Does-Not-Turn-On-133 615.shtml

  • My mac air will not turn on.  Totally unresponsive.

    My macair is not turning on at all. No response when I hit on button. I am panicking

    Please make a Genius Appointment and take it in for service.

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