Opening it from the back, working with maintenance on smartphones, for me this is normal. I unplugged it in the hope of being some error related to this, but to no avail.
I have same problem, only computer can detect the phone as 9008, thinking of removing the battery but do not have the necessary tool. So removing battery seemed won't help.
Saw a guide which also requires removing the battery. Ordered the tools and will try after they arrive.
Maybe you wanna try, so here you are dotandroid.com/android-root-guides/unbrick-qualcomm-mobiles/