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@Ada
Replace the IO port and then test again.
The hashboard can pass the single-board test but chip 34 RI voltage only 1.3V.
@Ada
Check the temprature sensor IC U88, replace it. Then there are domain voltage 8.5V and all chips hashrate [114],Nounce[912].
All the chips have been tested, but temperature 0 and all chips' hashrate reported as [00].
@Ada
Check the temprature sensor IC U88, replace it. Then there are domain voltage 8.5V and all chips hashrate [114],Nounce[912].
All the chips have been tested, but temperature 0 and all chips' hashrate reported as [00].
@Ada
It is possible that either chip 56 or chip 57 is faulty, or there could be an issue with the 0.8V voltage supply.
S9 single-board test showed Nonce [0] from chip 56, why this happened?
@Ada
No need to replace the chip. The hashboad is OK. Run it in the whole device. The hashrate will not be too low,
See the below single-board test result. There are 8.4V,8.5V domain voltage, replacing chip 1 did not work.
@Ada
See from the kernel log, the chains report 0 asic. Follow the 0 aisc repair process.
No hashrate, replaced several PSU, but did not solve it.
@Ada
See from the kernel log, the chains report 0 asic. Follow the 0 aisc repair process.
No hashrate, replaced several PSU, but did not solve it.
@Ada
To understand the initial problem, it is possible that the repalced chip are not compatible with the original chips. It is important to ensure that the bin numbers are consistent with the original hashboard when replacing with 9K chips. When retrieving chips from scrapped hashboards, make sure to select them accurately.
In the case of the S9K miner, why is there a decrease in computational power for hashboards 41-50 after the 40th hashboard?
@Ada
See above picture,there is only one fan. The fans are abnormal,
If the chips are confirmed to be in good condition but there is no computational power, how can we determine if the machine itself is functioning properly?
@Ada
The best way is by using the series-parallel 2-part method. If the chips are connected in parallel, it would be difficult to pinpoint the specific faulty chip. In that case, you would need to disconnect and measure each chip individually. However, if the chips are connected in series, you can remove the chip in the middle to determine whether the issue is before or after the removed chip.
How can we accurately identify which chip is faulty when the LDO resistance is abnormal and not functioning properly?
@Ada
Check it is the chip's output voltage 0 or the impedance 0. If the chip's output voltage is 0, check wheter there is output in the front domain, or there is coupling capacitor falling. and there will be no CLK in the next domain; If the impedance is 0, the chip's CLK signal is short-circuited, and you need to remove one of the chips in the domain to know which chip is shorted.
If the chip CLK value is zero while other aspects appear to be fine, what could be the issue？
@Ada
The temperature on the hashboard is uploaded through the connection between the 62nd chip and the temperature controller. If there is a signal interruption and the temperature is not displayed, you should troubleshoot it as a fault related to the 62nd chip. Treat it as a repair for the 62nd chip or as a repair for a missing chip.
How is the temperature of the hashboard uploaded? When encountering a signal interruption where the temperature is not displayed, how should the issue be investigated and resolved?
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