12-27-2021, 02:42 PM
RF, noise and line voltage spikes are typically (and cheaply) filtered out by capacitor filters in the input power supply, and the cheaper capacitors can and do degrade over time, losing their filter ability. That's the sort of input voltage filter I would expect to see in a small, cheaper than normal chinesium circuit board. Some will be good, some will be less so. Some will be junk. Just sayin'.
"Down the floor, out the door, Go Brandon Go!!!!!"

