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Mac Problems I have a G4 mac. It will boot sometimes, but after it comes on it will shutdown by itself. Sometimes, I can hear the fans running anf then they will shut down. Now, I can not get the system to boot at all..When I push the button to turn it on, the button is lit as long as I keep it depressed, but when I turn it lose, the system doe nothing...Please help

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You may need a new PSU.

Posted on Feb 13, 2010


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Automatic shutdown due to thermal event?is this the CPU fan?


Could be. It's just getting TOO hot in there. Listen and see if you can hear the fan working. Vacuuming out the CPU and all openings, case fan, power supply fan (vent) - as much as you can will ALWAYS improve heat related problems. Obviously, if you can not hear or see the fan working, you will know where the problem lies. If it the power supply fan, you will need a new power supply. Good luck. :)

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Dell dimension 2400 blue screen fault - page fault in non paged area. bug code 50. did system restore and changed memory board still faulty jim brand


Most likely the computer itself, the mother board in the Dells aren't very good. I would suggest the next time you buy a computer you should get a Mac. You'll have no problems at all, and you'll find that Microsoft Office for Mac runs far better too.

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This can be on your operating system or either the fan of the processor is bad. You just need to check both of that out.

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Popcorn3


Not unless that dell is running a Mac OS.
Popcorn 3 System Requirements
  • Macintosh computer with PowerPC G4, G5, or Intel® processor
  • Mac OS X v10.4.10 or higher
  • 300 MB of free disk space to install
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1 Answer

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2 questions:
When you say new motherboard do you mean an actual new motherboard or new to that machine, but came from another used model?
When you say you tested the power supply do you mean with a voltmeter/ammeter or put it in another computer and it worked?
I worked on several gateways with similar problems and it boiled down to motherboard issues.
I tested it by replacing the power supply with a bigger (used) power supply and it worked great (for 1 time) and then put the other power supply back in to confirm my diagnosis and yep it wouldn't boot. The next morning I was going to run some virus/malware cleanup and installed the other (known good) power supply and it would not work. I tried all day to get it to boot and it did about twice in a 4 hour period. When it did run it would run great but any attempt to restart it would cause it to crash. No ryhme or reason, it would not fail the same way more than twice. Sometimes beeps, other times no beeps, sometimes it would start up with no video (could hear the Windows starting sounds) other times it would start up normal. I could let it sit and it would start or I could keep trying in sucession and it would eventually start. Some times the fans would slow down from a roar, sometimes they wouldn't. So with a known good power supply that had 150 more watts than the original I diagnosed it as a failed motherboard. But if you have put in a brand new motherboard then I would replace the power supply, because a bad power supply does not mean no power, just not enough power. Please post back and let us know what you find out.

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Check if you have the appropriate specification to run it; try uninstalling and then reinstalling or running a troubleshooter if you have got the correct specs.

Sometimes software locks up due to not been activated, did you activate the product.

Hope this helps!

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no boot media found (maybe changed)
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reboot mac, press "C" while starting up, it'll try to detect any available media to boot from.

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first Check your ram & make it dust free.

Secondly show your motherboard to hardware engineer.

Check your antivirus updated so that there might be virus in machine

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1 Answer

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may be some conflict in os and hardware,
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