The Voice Recorders we use at work where you can eject the DVD using the remote interrogation software when you are miles from site BUT the tray then grinds itself into the cabinet door that houses the voice recorder, class.
A very critical piece of electronic equipment that routes data from multiple sources to other pieces of kit across a large chunk of the country which has two PSU’s to power it, one main, the other standby. Should you replace a duff supply with another of a different mark then there is a large unplanned thermal event on the chassis backplane killing the entire kit. The manufacturer only revealed that different version PSU’s shouldn’t be used together after the fact.
The brand new PSU’s that power our new radio system HMI’s. Should the power fail to the PSU and then be reapplied, because the components are so cheap and have effectively cooked themselves, the loss of power and reapplication causes them to fail, leading to the loss of the HMI and a safety critical failure. At a site where there was a power outage we lost 8 out of 9 HMI’s for most of a day whilst spares were couriered to site.
The AE35 antenna control unit.