My 1520 cannot connect to pc my glance screen is not working it crashes on setting it will go blank . Motion data crashes too I'm on the latest build 107
Have you tried other USB cables and/or ports on your PC? I have a couple of USB cables that will charge and even let me transfer files from my phone to my PC but the Recovery Tool won't always "see" my phone with them. There are a couple of cables that always work for me. Perhaps it is the same for you?I'd try going back to 8.1 and updating again but can't due to the computer connection issue. The recovery tool doesn't see it.