Running AHT, off the net, because I can't get that to run from anything else, only shows the expected error from the missing temperature sensor on the hard drive, because it's a genuine seagate non apple. I tried installing linux on that blank new drive and that worked fine and linux runs great on it. I can get it to boot in single user mode in any case, but nothing beyond that. external DVD installer disk (10.6 and 10.8) external HD in recovery mode (yosemite) Now with the whole fusion drive out (HDD&SDD) and a new blank seagate non apple drive in place (a 4TB), I get the same thing, and using a large number of methods to boot: However when it was failing and I was trying to boot from various other means, as from a usb stick, external drive or dvd, and it was only booting barely about 1/3rd of the way and stalling. The fusion drive was using the 3TB seagate baracuda that was under the apple recall, and it failed. I have a similar issue, with my imac 27" EMC 2546 from late 2012. Reboot into Single User mode and reload your OSX system.Īt step (5) You may not have to reload your system files, just set up your PRAM. You can access your CD drive now, put in your BOOT CD (OSX disk). I cannot remember if I hit EJECT on the boot menu or on the keyboard. You MUST use the COMMAND-OPTION keys on the RIGHT side of the keyboard.ģ) Let the machine boot THREE times (mouse lights up on each boot cycle, turn it over to see)Ĥ) After the THIRD or FOURTH boot cycle hold the OPTION key down ONLY.ĥ) A BOOT MENU should appear. You will still need enough RAM to run the machine of course.ġ) After changing your RAM either up or down.Ģ) Using a wired keyboard, start computer with keys COMMAND-OPTION-P-R pressed in. To do this you need to alter your RAM configuration first by adding or removing memory. Therefore I couldn't wipe the hard drive and reload OSX. Stupidly I put in a firmware password and forgot it and I had recently blocked anybody accessing my CD drives etc. I had the same problem on my iMac dual-core 3.06gHz. I don't have Apple care nor warranty and there's no Apple store/Genius Bar nearby. I've looked around and found several guides dealing with this exact problem, but as you can see from the elaborate list above, none of those remedies have worked for me.Īny help is greatly appreciated, I'm on a tight deadline to finish this animation project and this is the only machine I have access to at the moment. Then did "exit" and also "reboot" commands, both ended in white screen. I'm able to browse the HDD in single user mode using the shell. Entered sIngle user mode (Cmd+S) and ran fsck -fy on boot disk, it gave a few minor errors, so I repeated fsck -fy a few times until it no longer gave errors, still doesn't get past white screen.Tried to run through Mountain Lion Recovery Disk, same white screen.Ran a thorough Apple Hardware Test off the internet through ethernet cable, took 1:45 hours and it showed no errors.Tried booting from an external Mountain Lion Install USB drive, it shows up in Disk Selector, am able to select it, but then it stops at white screen.Holding down Option key during startup brings up the disk selector (I have 2 partitions one with Lion and one with Mountain Lion) neither boots up.Removed ram cards and powered up, it did the SOS beep with 5 second intervals, so I'm guessing logic board is fine.SMC reset (unplugged power source for 2-3 hrs, held down power button for 10 sec).The keyboard doesn't work as caps-lock light wont come on. It does the chime sound, then the apple logo with indicator and then just goes to a white screen. Yesterday, I was working in Autodesk Maya, and suddenly whole screen went black, so I did a hardware reset, by holding down the power button.Īfter that the iMac doesn't boot properly.
0 Comments
Leave a Reply. |