I’m having a very strange electrical issue in my house and would appreciate any advice from people who have experienced something similar.
Here is what happens:
I have an LG OLED TV and a PS5.
When I try to connect certain 5-meter HDMI 1.4 cables to either the TV or the PS5, the main breaker trips. It can happen as soon as I insert just one end of the HDMI cable into either device, even if the devices are switched off but still plugged into the mains.
I tried two different 5-meter HDMI cables, and both caused the same issue.
A 3-meter HDMI cable works without any problems.
Something similar happened when I connected an 20 meter Ethernet cable to a powered TP-Link switch that was already connected to my MikroTik router. The main breaker tripped. Again, a 3 meter ethernet cable works without any problems.
The breaker has to be reset manually, and the entire house loses power when it trips.
The electrical installation has had the required inspections. I contacted my electricity distributor, but they told me to call an electrician. I’ve also contacted several private electricians, but none of them could suggest what might be causing this.
I haven’t deliberately reproduced the fault since, and I don’t want to keep testing it because I’m concerned there could be a potentially dangerous electrical issue.
What could cause a breaker to trip simply when connecting HDMI or Ethernet cables?
Could this be related to a grounding/earthing problem, a voltage difference between devices, a faulty power supply, or something else?
Has anyone experienced something similar and found the actual cause and solution?
Any suggestions on what a qualified electrician should measure or investigate would be greatly appreciated.