My UpAir One won't arm it's motors! (again!)

Well this appears to be the same problem that I sent my quad back to Banggood a few months ago.  I'm better at taking it apart now and honestly, this one was my fault...  I was out flying a distance away and triggered a RTH (return to home) because of weak signal strength but after the quad returned to LOS from me, I overrode the RTH and began to fly around locally.  Well, it's well known (at least to me) that if you override RTH, then that's your last free ticket with the Upair, the next failure, such as a low battery RTH will fail and the quad will fall out of the sky!!!  (and that's what happened!)

After picking up my camera and the broken landing gear, (my UpAir fell from about 60' on soft sand!)  I tried starting the motors again but it wouldn't arm any longer.  I took apart the drone to look for any loose or broken components but there wasn't anything visibly wrong so I just kinda left it on the bench for a couple of months while I tried to research the issue.  I've had luck with heating some electronic components to I got out my heat gun and heated up the SD card where it had been super glued by Banggood.  I gave it good heat cycle, probably 300-400° for about 60 seconds and after letting it cool again I mounted the battery on the board and tried powering it up.  After a normal startup sequence, I tried to arm the motors again and VIOLA, IT WORKED!.  

Well that would explain Banggood super-gluing the SD card in.  A loose connection on the card would cause the quad not to be able to complete it's boot sequence and not let the motors arm.  

Update:  I'm not positive that the SD card was the problem, I also heated up the IC located on the center of the daughter board.  It also could be that component but it's enough of an issue to take the UpAir apart that I wanted to heat both components just in case.

The bottom line is that my UpAir is STILL flying and although I haven't electronically logged each flight as I have with my Phantom 3 Pro, I've flown the UpAir just as much or even more.   Right now, I have 30 hours and 201 flights on my Phantom 3 Pro, and I have at least that much on the UpAir too!

More about this:
https://aviatorsdronelog.blogspot.com/2017/06/upair-one-px4-flight-controller-board.html

Upair One - No MAV data

Are you sitting there with your UpAir One on the shelf because the motors just won't arm?  Well,  I have been there twice now!    No MAV Data, motors won't arm is my previous experience with sending my drone back to Banggood.  The only change that I could see was that the internal SD card was super-glued into it's mount rather than the silicone (RTV) that was as the original craft was delivered to me.

Well, after a crash, which was my fault after an override on a low battery RTH, my quad sat on my table for 2 months until I had an idea.  Sometimes heating a circuit board will  repair it.  I decided to take the heat gun to the SD card and viola!  After heating the SD card (still superglued in by Banggood) I plugged in the battery and tried to arm the motors and it worked!.  I put the quad back together and took it outside and flew it for the first time in over two months!

My supposition is that the reason the Bangood superglued the SD card in is that it's having trouble with connections in their SD mount.  It's not that it's working loose, but that the connections are poor or the the SD card itself is of poor quality.  I don't know, but the problem appears to be centered around the internal SD card.