Not to put words in Tek's mouth, but I think that the backlight dissipates some of the energy that would otherwise be dissipated in the regulator - so the "replacement" would likely be a series of diodes or something to dissipate a similar amount of energy and drop the voltage for the regulator. There might be a way to carefully choose that replacement to reduce the amount of energy dissipated - although if it's an LDO then there's always going to be a fixed amount of energy that gets turned into heat while the CA is on.solarEbike said:I've noticed that brightness of the backlight is occasionally mentioned during troubleshooting so I had a feeling you might say something like that. I think I'm going to leave the backlight alone for now so please don't go to any extra effort unless others express an interest.
The conspicuousness of the backlight at night was one reason for asking. I guess I can just cover it for now if I feel the need. The other reason was suspected current drain which I just measured to be 50 mA at 41.5V for my CA3 with backlight on and Sempu BB plugged in.