A19 TRH 2m died overnight. Even after power cycle (to the entire mote), it didn't come up. Found that, indeed, this sensor (#65) wouldn't talk on the I2C (though the fan was on). I installed spare sensor #67 and it reported only nan! I tested spare sensor #07 (removed from another station long ago) and it seemed fine. Set CUR 80 on #07 and installed it.