I got it working enough to get everything off of it by using the fsck and after “volume appears to be ok”, typing “reboot” (this was the only way to get it to boot up normally as none of the other key prompts would work). I’ve spent the last 2 days troubleshooting my neighbor’s MBP late 2011 with the same problem after they had it in the repair shop 3 times for $500. I'm noticing that the computer is getting unusually hot, roughly where the fans are (i.e. Booting over Firewire from another computer in Target Disk Mode: No difference. What in God's name is going on here?Īlso tried: Apple Hardware Test, extended testing: No trouble found. I have tried: Booting in Safe Mode (no indication that that took effect), zapping the PRAM (seven reboots in a row to be sure), resetting the PMU (twice), Verbose mode (which works, until it goes to the white screen of death), Single User Mode (which works just fine, but all I know to do from there is to fsck the disk, which returns no errors), unplugging the battery for 30 seconds or so, resetting the RAM in its slot, and, as I said, repeatedly attempting to boot from an emergency drive. When I boot to my Protogo, it shows a line of random colors in the upper portion of the screen for a second before it goes to the white screen. When I went to Recovery or Internet Recovery (after it downloaded the installer), it would go to a horrible blue screen, that looked like some kind of awful graphics error-it hurt my eyes. Once it immediately turned itself back on after I forced to turn off by holding the Power button for six seconds. However, last night it would sometimes do that, and sometimes go to the white screen and then shut down, and sometimes spontaneously reboot, over and over. It will show the Apple logo and the loading bar, then go to an all-white screen and stay there. Not only to the new internal drive, but to the Protogo, or to the original drive, or to the Recovery partition, or to Internet Recovery. Everything worked fine I installed the drive, booted with a Techtool Protogo USB stick with the High Sierra installer on it, formatted the disk with Disk Utility, installed High Sierra onto it, waited for it to reboot, plugged the old drive in via a Universal Drive Adapter, and restored all the data using the Migration Assistant built into the initial startup sequence. The original HDD was drastically slowing down and giving SMART errors, so I replaced it with a (somewhat smaller, but still big enough for all the data with room to spare) SDD. I was doing a routine hard drive replacement. Resetting PRAM, PMU, Safe Mode, and booting from external drives all have the same result. That’s versatility.Tl dr No matter what I do, I get a white screen on startup after the Apple logo. What’s more, you can reconfigure your device profiles anytime you need. Plus you can add other utilities, like anti-virus, to complement your profiles and help you prevent costly repairs in the future. Your Protogo profiles include TechTool Pro to diagnose hardware issues, repair drives, fix disk permissions, clone volumes, backup your Recovery HD to another device, and a lot more. Once you see how well that works, you’ll protect all your Macs with Protogo. You can create your own custom profiles too, and your device will run software faster than from a DVD. With Protogo and just a few clicks, you can configure a bootable device to maintain and monitor your Macs for impending problems. Plug in a flash drive or retired iPod to help maintain or repair your Mac. Just drop it into your pocket, take it anywhere. Now you can boot, run diagnostics and perform drive repair on multiple Macs, both Intel and PPC, from a single, portable device as small as a flash drive. Using Protogo, you can easily turn a USB or FireWire device, such as an iPod, flash drive, compact hard drive, or SD Card, into a powerful toolkit to troubleshoot all of the Macs in your life. TechTool Protogo easily lets you turn your USB or Firewire device into a bootable, diagnostics toolkit for Mac.
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