Repairing cold solder joint on the REV Pneumatic Hub

Repairing cold solder joint on the REV Pneumatic Hub. The ground plane acts as a huge heat sink.
Note that repairs of this kind are permitted by R710M. "Devices may be repaired, provided the performance and specifications of the device after the repair are identical to those before the repair. "

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We had a similar issue last year where our pump would not turn on. We ended up replacing the pneumatic hub and it worked. We never ended up looking into though. I suspect it may be the same issue.