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this post was submitted on 15 Jul 2023
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No Stupid Questions
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It’s hard to tell without a circuitry layout, but my best guess is that there’s probably capacitors in the power brick acting as an electrical filtration for the motors to make them operate smoothly and reliably.
The capacitors are probably discharging some electricity that are keeping some circuit protective device alive. Unplugging the power brick is probably the only true way to completely remove electricity from the unit.
Oh that does make sense. So if I unplug the unit from the wall outlet side and just wait it should also work? In theory I just need to wait long enough for the power brick to discharge completely. I'll try that next time. Thank you!
It’s just a theory based off of my own experience, but if that’s the issue, it kinda depends on how large the capacitors are and what kind of capacity they’re capable of holding.
If it is the issue, I’d expect it to take like 5 minutes for it to discharge completely, but that’s just a guess. If everything is already out of its usual place, you could probably test it if you’re curious enough.
Could also be the exact opposite (experienced this with consumer grade electronics based on microcontrollers often enough):
Because of the large capacitors, voltage from the power brick kinda "ramps up" when it is plugged into the wall. The device/its MCU/most specifically its clock circuit however prefers a hard edge of power being turned on, to reliably trigger its power on reset circuit/oscillator.
You can think of it similar to a pendulum/newton's cradle/metronome - they also prefer one decisive push to get going reliably.
Unplugging the brick for a longer time is still worth a try, but it could also be this.