Hi Guys ! I had the same problem this week, moreless. I have a macbook pro 13 inches mid 2012, not under guarantee. The very same problem occured : withe screen after startup chime then nothing. The screen eventually turned black with white text "a disk error occured press ctrl+alt+del to restart" which is a windows 7 error message from my bootcamp. Not a single one of the usual fixes and combinations listed above worked. This means that the macbook can't boot neither on OSX nor Windows bootcamp. I suspected a disk failure which is strange because it is a SSD, which is usually more reliable than a normal hard drive.. So I opened my macbook, took the drive apart an put it in an external enclosure to boot in USB. It worked like a charm ! (wtf ?) So I ran the utility disk to repair any eventual disk problem then remount the SSD inside. This time the MBP could boot but only on recovery mode (screen with question mark folder, then a world globe asking for a wifi to run the recovery mode), the utility disk...

Hello everyone,

I did this fix on my iPhone7 and the whole process whent really well ! The previous screen were shattered and litterally unusable so I needed a new one. After replacing the screen and before sealing it, I tested it real quick and the screen were working like a charm (tested only on the emergency call keyboard on the unlock screen) so I decided that the test was sufficient to seal it.

But after sealing it, I decided to use it for real. To unlock it and configure it back to life (the shattered screen probably made me done weird stuff so the phone was blocked really hard), I needed to be connected to iTunes to restore it properly.

But here is where things went really bad : the phone is charging on a USB outlet but it’s not recognised at all when connected to a computer. So my phone is actually working but I cannot use it at all because I need to connect it to iTunes. This is bullshit !

Did I make an error whil reassembling it ? Has anyone had this problem also ?

Many thanks for your help !