Hi everyone, I'm on a s9 13th and a card shows me signs of a hashrate drop after 5 minutes of mining (OS braiins ). I look at the logs everything is top, starts correctly the only concern being this line which appears before the fall of hashrate:
2022-11-30T13:20:12.562165Z ERROR bosminer_hal::sensor: Sensor hb8[ii_hwmon::tmp451::TMP451]: read failed: I2C error: general error Hashchip: no response for read_register(reg=0x20) from chip One(61)
I then looked more closely with a magnifying glass by desoldering the heat sinks, it seems okay to me on tmp541 chip, no dust, the welds are not cracked… a friend told me that as for the s17 the welds crack over time and make false contacts.
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fibb.co%2FwJKcpxJ&t=665&c=FyiYFb221niL_A)
I noticed that on the hashboard when the sensor goes wrong, the little red light flashes more slowly like a bad contact (if it helps I say so)
also in the line of code I saw write Chip 61, so I decided to test the chip as well as its surroundings and I came across the correct values of CLK: 0.9 and RI 1.8 in 12v plug.
from what I understood it is, the more its heating (so after 5min to heat up) the closer we get to a crash point because of the sensor (or other)
for the moment I am there without too much additional info… an idea maybe?
Big Thanks 🫡