When you see all chips in the Bitmain Antminer S19 status had become “xxxxxx”, it might not necessarily be a hash board defect but a miner grounding issue.
Below picture is an example:
When the miners are improperly grounded, electricity can leak from the wiring system onto the miner’s outer body or casing (because it is a metallic surface), eventually harming the control boards and hash boards.
To improve and extend the miner’s shelf life, keep the voltage below 0.3 V. On the other hand, a miner will be harmed by voltage above 1 V.
- Plan or complete grounding with the help of a qualified electrician.
Check the following to test if your miner is grounded:
1. The miner must not come into contact with any metal shelves when using this technique.
Adjust the multimeter to 220 V AC. Place the test lead for the multimeter on the exposed metal shelf and the miner’s aluminum body/casing when it is operating.
- Voltage means that the grounding is not complete or appropriate, and that immediate action is needed.
- If no voltage is found, the grounding is sound and there are no leaks.
2. For this technique to work, the control board panel of the miner’s Ethernet port must be separated from the metal frame of the miner.
Adjust the multimeter to 220 V AC. Place the test leads for the multimeter on the miner’s aluminum body and the metal frame of the Ethernet port when it is operating (see the photo below).
- Voltage indicates improper or incomplete grounding, and prompt remedial action is necessary.
- If no voltage is found, the grounding is sound and no leaks are present.
Please feel free to get in touch with us if you have any questions so we can help.