Broadcast Equipment Failure in Early Television

[Rinehart]

The reading about 1936-50 television I have done so far has been concerned with learning how the hardware worked, but next I want to learn how the hardware failed to work, which I think will be more fun. Essentially, it's everything that could go wrong that would lead to interruption of service. I am not counting things like lightning striking the station or ice storms causing the antenna to collapse, which are beyond the control of the broadcaster. I would like to know at least in general terms what the most common component failures were and how long they would take to rectify, and how many minutes per month on average would a station expect to lose because of them. I would be surprised if many station logs were still around, but does anyone know if people compiled figures at the time, and whether these reports are extant?