Well, the resistor is 39 Ohm. I guess this is acting as a fuse and something else is also broken. I already destroyed one failed SonOff mini where this component had become open circuit because I didn't investigate to carefully.
I've had two devices fail now, after only a couple of days use.
Hi, I connect in the wrong way my sonoff mini, nobody solve replacing the 39 Ohm resitor (R9)?
Please let me good news.
I unsoldered the resistor from the working device and soldered instead of the burned one, connected it correctly to the power, but it burned out. I think there is already a short circuit in one of the components and the repair is not worth the effort, so just take a new one. A burned device you can disassemble into spare parts.
someone will tell me what resistance is the R9 resistor
You must replace R9 resistor (by 39 to 500 ohm) and diode bridge to make it work again.