I hear the gong at start up...

and then i see faint blue lights inside the monitor (lower corners)...
and that's as far as it goes.
no grey screen, no apple logo, and no spinning grey wheel.
i have not been able to turn on.
it was on earlier today, went to sleep
and never woke up
help
specs:
iMac retina display
OS yosemite and all updates to apple software
Adobe CS6
Aperture
Office
chrome, safari and firefox

It's in warranty, so take it in for service.

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My macbook doesn't work. After pressing down the power button I hear the sound from starting the apple symbol appears and after a while a sign prohibited appears on the place of the apple symbol

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Hi Kappy Thanks for your answer. I did a reboot on my Macbook as suggested and this operation is going on non stop for 14 hours and on the screen always appears the same message that you can see in the picture in attachment. Any ideas?

On start up I hear the chime but nothing comes on display

On start up I hear the start up chime but can not see anything on display but very vague images

1. Reset PRAM. http://support.apple.com/kb/PH4405
2. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
If this does not help, contact Apple.
Bst.

My Macbook Pro will not boot up. I can hear the sound that it has started and then goes into an infinite loop.

My Macbook Pro will not boot up. I can hear the sound that it has started and then it goes into an infinite loop.

What model MBP and which version of OS X? Sounds as if the hard drive may have failed. If you have an installation disc, try booting with it. If your machine came with Lion or Mountain Lion, try booting to the Recovery partition - Command and R keys held down while booting.
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Been using an Avastor HDX-800 for storage and backup, also a SUPERDISK for smaller stuff; recently the SUPERDISK does not appear on the screen, and the light blinks while you hear it spin, also the Avastor has started to have the same problem, both USB

Been using an Avastor HDX-800 for storage and backup, also a SUPERDISK for smaller stuff; recently the SUPERDISK does not appear on the screen, and the light blinks while you hear it spin, also the Avastor has started to have the same problem, both USB conncected, both worked well before, but both now spinning, blinking, and not showing up on the screen as before,
Interestingly they both appear in the System Profiler, but just not working the same as before
I have tried other USB ports, but the same responce,

yes I did reset the PRAM, but no benefit, still the same problem
my usb devices are: keyboard, mouse, printer, SD-USB-M3, and LaCie d2 DVDRW:
the mouse and printed are plugged into the keyboard: i have tried to move, these around, and have even tried just the mouse, printer and SD-USB-M3, but still the same problem
here is a cut and paste of the current "System Profiler>Hardware>USB"   (usb device tree)
USB Bus:
Host Controller Location:          Built In USB
Host Controller Driver:          AppleUSBOHCI
PCI Device ID:          0x0026
PCI Revision ID:          0x0000
PCI Vendor ID:          0x106b
Bus Number:          0x18
Hub in Apple Pro Keyboard:
Version:          1.22
Bus Power (mA):          500
Speed:          Up to 12 Mb/sec
Manufacturer:          Mitsumi Electric
Product ID:          0x1002
Vendor ID:          0x05ac (Apple Computer, Inc.)
HL-1270N series:
Version:          1.00
Bus Power (mA):          100
Speed:          Up to 12 Mb/sec
Manufacturer:          Brother
Product ID:          0x0008
Serial Number:          L9J286292
Vendor ID:          0x04f9
Basic Optical Mouse:
Version:          0.00
Bus Power (mA):          100
Speed:          Up to 1.5 Mb/sec
Manufacturer:          Microsoft
Product ID:          0x0084
Vendor ID:          0x045e
Apple Pro Keyboard:
Version:          1.22
Bus Power (mA):          250
Speed:          Up to 12 Mb/sec
Manufacturer:          Mitsumi Electric
Product ID:          0x0204
Vendor ID:          0x05ac (Apple Computer, Inc.)
SuperDisk USB 120MB drive:
Version:          0.0e
Bus Power (mA):          500
Speed:          Up to 12 Mb/sec
Manufacturer:          Imation
Product ID:          0x0002
Vendor ID:          0x0718
Hub in Apple Pro Keyboard:
Version:          1.22
Bus Power (mA):          500
Speed:          Up to 12 Mb/sec
Manufacturer:          Mitsumi Electric
Product ID:          0x1002
Vendor ID:          0x05ac (Apple Computer, Inc.)
HL-1270N series:
Version:          1.00
Bus Power (mA):          100
Speed:          Up to 12 Mb/sec
Manufacturer:          Brother
Product ID:          0x0008
Serial Number:          L9J286292
Vendor ID:          0x04f9
Basic Optical Mouse:
Version:          0.00
Bus Power (mA):          100
Speed:          Up to 1.5 Mb/sec
Manufacturer:          Microsoft
Product ID:          0x0084
Vendor ID:          0x045e
Apple Pro Keyboard:
Version:          1.22
Bus Power (mA):          250
Speed:          Up to 12 Mb/sec
Manufacturer:          Mitsumi Electric
Product ID:          0x0204
Vendor ID:          0x05ac (Apple Computer, Inc.)
HL-1270N series:
Version:          1.00
Bus Power (mA):          100
Speed:          Up to 12 Mb/sec
Manufacturer:          Brother
Product ID:          0x0008
Serial Number:          L9J286292
Vendor ID:          0x04f9
Basic Optical Mouse:
Version:          0.00
Bus Power (mA):          100
Speed:          Up to 1.5 Mb/sec
Manufacturer:          Microsoft
Product ID:          0x0084
Vendor ID:          0x045e
Apple Pro Keyboard:
Version:          1.22
Bus Power (mA):          250
Speed:          Up to 12 Mb/sec
Manufacturer:          Mitsumi Electric
Product ID:          0x0204
Vendor ID:          0x05ac (Apple Computer, Inc.)
SuperDisk USB 120MB drive:
Version:          0.0e
Bus Power (mA):          500
Speed:          Up to 12 Mb/sec
Manufacturer:          Imation
Product ID:          0x0002
Vendor ID:          0x0718
USB Bus:
Host Controller Location:          Built In USB
Host Controller Driver:          AppleUSBOHCI
PCI Device ID:          0x0026
PCI Revision ID:          0x0000
PCI Vendor ID:          0x106b
Bus Number:          0x19
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Capacity:          451.76 MB
Removable Media:          Yes
Detachable Drive:          Yes
BSD Name:          disk2
Version:          0.00
Bus Power (mA):          500
Speed:          Up to 12 Mb/sec
Manufacturer:          LaCie
OS9 Drivers:          No
Product ID:          0x1011
Serial Number:          FFFFFFFFFFFF
S.M.A.R.T. status:          Not Supported
Vendor ID:          0x059f
LaCie d2 DVDRW USB:
Capacity:          451.76 MB
Removable Media:          Yes
Detachable Drive:          Yes
BSD Name:          disk2
Version:          0.00
Bus Power (mA):          500
Speed:          Up to 12 Mb/sec
Manufacturer:          LaCie
OS9 Drivers:          No
Product ID:          0x1011
Serial Number:          FFFFFFFFFFFF
S.M.A.R.T. status:          Not Supported
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My mac book pro will not start, i hear the fan sometimes but nothing else

my mac book pro will not start, i hear the fan sometimes but nothing else

What is the exact model of your Macbook Pro?

HT1379 Guys please help? My MacBook Pro won't start up. I have tried the resetting Mac's PRAM and NVRAM procedure with no success. All I see is just the black or grey screen although I hear the drive running.

Guys please help? My MacBook Pro won't start up. I have tried the resetting Mac's PRAM and NVRAM procedure with no success. All I see is just the black or grey screen although I hear the drive running.

Hold shift key down while booting should get you in
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Step by Step to fix your Mac

Hey ppl,my macbook is not booting and by that i mean u can hear the audio wave when its starting up,the screen goes white and then after a while there's a folder with a question mark in the middle of the screen...anyone,any ideea?!?

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That folder with the question mark icon means that the MacBook can't find the boot directory. That can either mean it can't find the hard drive or the hard drive data is somehow corrupted.
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Booting From An OS X Installer Disc
1. Insert OS X Installer Disc into the optical drive.
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4. Release the key when the spinning gear below the dark gray Apple
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When i switch users internet becomes unresponsive, also started to hear the fan when just using normally

Hi
Had my macbook pro for nearly 9 months now and noticed a couple of odd things.
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4,000 RPM for idle load seems excessive, 2,000 is usually the norm.
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1: Dead sensor or fan, the other is compensating. - #3 Hardware Test needed.
2: Need a SMC reset - #1 SMC Reset.
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Open Activity Monitor > All Processes and click on the CPU to sort the highest to the top and see if something unusual is hogging cycles.
Step by Step to fix your Mac
Other possible reasons:
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6: Your machine is in a excessively hot environment
7: Your machine is in a excessively dusty or animal environment and the exhaust ports are clogged with animal hair/lint., will require cleaning by Apple if still under AppleCare/warranty.
8: There is malware on your machine, or your third party software is no functioning correctly leaving processes running.
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10: You have a corrupted cache file. #12 OnyX cache cleaning routine.
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Hey Uttej Shas!
I have an article fro you that can help you troubleshoot this issue with your iOS device:
iPhone: Receiver and call audio quality issues
http://support.apple.com/kb/ts5196
Thanks for being a part of the Apple Support Communities!
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See this link for some tips.
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I hear the gong at start up...

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