Testing of FPV monitors usually involve a great deal of plugging and unplugging of power cables.

Such actions usually wear out components faster than expected, thus exposing weak points. One such weak point was discovered on the XT60 power connector of the FPV monitor which we took from the seniors:

Notice how the solder joint came off cleanly off the connector. This implies that whoever did the soldering for this was not very experienced. The temperature was hot enough for the solder to soak into the wire, but not hot enough for it to adhere to the XT60 connector. What’s more, since this fault was hidden under a layer of heatshrink, it would be impossible to spot until it decides to give way (which thankfully, happened in the lab and not while we’re flying)!

I proceeded to resolder the connector and all has been well ever since.