Repairing Tag Heuer watch

This watch has been fixed by shop once and claim the circuit board was changed. It stops working 12 months afterwards.
After changing battery,  it does not work.
 First disassemble to see if any sign of moisture condensation. Then lubricate the very tiny gears. It still does not function at all.

Finally I found one of the component has fracture soldering. After resolder it, it finally works again!