Clock and Lights don't match up. Buzzer Beater.

[Freddy]

2-12-7, "If a red/LED light is used, the light is the official expiration of playing time."
So, is it our responsibility to confirm what some perceive to be an equipment malfunction? Or do we "call it by the light", and "call it by the horn" if no light, then let others sort it out later whether or not the system wasn't was not right? Does "clock malfunctioned" clause in 5-10-2 give us the task of ruling according to whatever technical knowledge we can bring to bear on the situation for which we have no video review?