- Oct 11, 2014
- 38,261
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Electrical systems can and do degrade.
As can individual devices themselves causing shorts etc.. Especially if power strips/surge protectors are being used when there are not enough outlets available. Discount bin devices are easy to find and cheap to buy. Low standards (if any) in many places.
Corrosion, rodent chews, voltage/current spikes, settling (buried lines), water, staples/nails wearing through, connections working loose.
Can be very slow and no one notices until there is some visible sign, a burning smell, or someone mildly shocked.
In some places, people have no qualms about tapping into electrical systems to share or steal electricity. Often such connections are unsafe and dangerous.
Eventually the electrons find other ways to go. And problems begin....
Remember your diagram. The diagram may reveal a ground (earth) loop.
https://resources.pcb.cadence.com/b...-and-how-to-minimize-its-harmful-consequences
https://artist-3d.com/ground-loop-pcb/
(You can easily find other similar explanations - and diagrams.)
Generally associated more with audio issues but with all the connected electronics these days - who knows what all may be going on.
As I understand the troubleshooting process thus far it appears that most likely suspects have been eliminated.
No harm in going back and methodically repeating some of the tests just to be sure.
If nothing found then, I think, the electrical circuit(s) are suspect.
As can individual devices themselves causing shorts etc.. Especially if power strips/surge protectors are being used when there are not enough outlets available. Discount bin devices are easy to find and cheap to buy. Low standards (if any) in many places.
Corrosion, rodent chews, voltage/current spikes, settling (buried lines), water, staples/nails wearing through, connections working loose.
Can be very slow and no one notices until there is some visible sign, a burning smell, or someone mildly shocked.
In some places, people have no qualms about tapping into electrical systems to share or steal electricity. Often such connections are unsafe and dangerous.
Eventually the electrons find other ways to go. And problems begin....
Remember your diagram. The diagram may reveal a ground (earth) loop.
https://resources.pcb.cadence.com/b...-and-how-to-minimize-its-harmful-consequences
https://artist-3d.com/ground-loop-pcb/
(You can easily find other similar explanations - and diagrams.)
Generally associated more with audio issues but with all the connected electronics these days - who knows what all may be going on.
As I understand the troubleshooting process thus far it appears that most likely suspects have been eliminated.
No harm in going back and methodically repeating some of the tests just to be sure.
If nothing found then, I think, the electrical circuit(s) are suspect.
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