Bonsoir elsenateur,
You have one or more relays "SIP-1A05- Pan chang", that it's in short or open, they are on the bottom PCB, RR1, RR2.....
Also check the resistors of 1.0 ohm that are near the regulators
If You use a never software than 8.x on clone device, that software in some situations will kill Your relays.
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