Shandon Histocentre 3 embedding center. This unit is intermittently losing the date and time, and shutting off the paraffin tank and tissue tank heaters. The voltage across the super capacitor on the control board is normally about 4.5V, while the instrument is plugged in, and drops to about 3.6V (which it holds steadily) when the instrument is unplugged. What I have seen, when it fails, is that the date and time is wrong (year shifts back to 2000), the tank heaters turn off, and the voltage across the super capacitor drops to about 2.9V. The voltage on the super capacitor stays at that low voltage, until the instrument is power cycled, after which it immediately begins charging up (eventually getting back up to ~4.5V). The time and date can be reset, and all functions seem normal. Many years ago I had to replace a super cap on one of these control boards, but this seems like it is something else on the control board. Has anyone run into something like this? Does anyone know of a facility which has replacement control boards? Does anyone know of a facility which has experience rebuilding these control boards?