And use a magnifier lens to check that the power cable connector is well aligned with the contacts of the watch board. Otherwise it will not work. And be careful when bending and fixing the two buttons (back & power) on the case so they are not damaged when you put the board back to the case. Its very sensitive and small. And thanks for this video!
This video is really helpful, I'm in the middle of the soldering process right now. My only question here is then to make it get sticked into the motherboard we can put the soldering iron machine literally over the flex cable if i'm not mistaking. Is there any risk of touching the flex cable just over the area you want to solder as you did in the video with the soldering iron machine?