Mac A1278 Leds Blinking Quicky Not Turn On
Your profile was created when you were using 10.5.8, I hope that since then you have upgraded to 10.6.8 or above.-Troubleshooting: My computer won't turn onSymptomsIf your Macintosh computer won't turn on, here's how to troubleshoot it. Reset SMC For 'Mac wont' turn on or boot' and relatedNote: It is possible that the SMC could encounter an issue that may cause unusual system behavior typically related to the symptoms described below. In some cases, resetting the SMC may be the only correct method to resolve the issue,General purpose Mac troubleshooting guide:Creating a temporary user to isolate user-specific problems:Identifying resource hogs and other tips:Starting the computer in 'safe mode':To identify potential hardware problems:General Mac maintenance. Be sure you backup your files to an external drive or second internal drive becausethe following procedure will remove everything from the hard drive.About TimeMachine backups and Recovery ModeOS X Lion and later let you:Start from using your Time Machine backup disk. With OS X v10.7.3 and later, Time Machine backs up the Recovery System on your Mac to your backup drive as well.
This lets you use your Time Machine drive to start up your Mac if needed.OS X Recovery:-Reset SMCResetting NVRAM. Safe Mac Guide(MacPerformanceGuide is also an excellent web site for ideas on upgrades and optimizing for application type uses))Mac OS X: Starting up in Safe Mode -What is Safe Boot, Safe Mode? I am this exact issue today.I hear no chimes at all, just a constant flashing light approximately 2 per second with no breaks in the pattern what so ever so there is nothing to count for a specific pattern. I tried some tof the various key combos at startup from Apple docs but nothing will get it to startup or get to a startup screen. I do feel some air flow so it appears the fan is on. I can't eject the drive bay to startup from a DVD. All the ram has been working in this for quite a while.
It was working fine the other day and quite distressing as it's my main recording studio computer and I have a session in two days. Any other ideas to try?TIA, CraigLate 2008 Mac Pro 3.1, 8 core 2.8GHZ 28 GB ram 6 internal HDs.OS10.8.5 is the default startup HD and there is another 10.6.8 startup on another internal HD. I have 28GB of ram in there now all 8 slots are used. Six 4GB and two 2GB modules DDR2 6400 800 mhz and all have lifetime warranty. I did a memory test maybe 3 weeks ago and all passed then with Techtool pro. It seems like they all could not have failed and there should still be enough working ram in there to start up or is that not the case? If only one or two failed shouldn't I still be able to startup or would that affect all of of them in some way and hinder startup?
Would the thing to do to be just start removing modules and and try starting up see if one of them is the culprit? Four of the modules were added about 2 months ago maybe I should start with those?Grant Bennet-Alder wrote:approximately 2 per secondThat IS a deliberate pattern, as opposed to random flashes of arbitrary duration.That indicates 'not enough working RAM to start up'. If you were to remove all the RAM, you should get a very similar symptom, although the pattern may change slightly. Apple Footer.This site contains user submitted content, comments and opinions and is for informational purposes only.
Mac A1278 Leds Blinking Quicky Not Turn On Youtube
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