Antminer S9 burned power connectors

[Bebeone]

Hi guys,

Im asking for your help. Recently one of my antminers S9 lost hash power on one of the chains. When I came to inspect whats wrong, I have found burned power sockets on of the hashboards. The cable isolation leading to this sockets is also burned. See pictures.

Does anyone have similar experience, is it repairable and what has caused this? Thanks for your opinions.

https://www.dropbox.com/s/7wrzh6825rlabzi/IMG_6516.jpeg
https://www.dropbox.com/s/7wrzh6825rlabzi/IMG_6516.jpeg

[philipma1957]

many many many times that has happened.

how clean were  the insides of the machine?

dust build up can cause the issue.

it is dead and gone most likely.  at least the one burnt board and the psu are most likely not fixable.

open unit dust it out and try running  it with 2 board.

[Bebeone]

Hi there,
thanks for your reply. The unit and the psu are working with the two remaining hash boards. When I opened the unit, it was very little dusty, nothing major.
Im waiting for spare parts and will try to repair and run this burned board.

[BitMaxz]

I think the reason why it burned because you didn't attach it properly.

Anyway, you can still repair it if you have 6 pin GPU male terminal if you have some GPU miner with riser you take the 6 terminal and put it to your hashboard.

This is what it looks like



Or buy 6 pin GPU terminal on Alienexpress/



Source: https://www.aliexpress.com/item/32841581290.html

[mikeywith]

Nice riser there, technically what you said there is correct, electricity does not like "loose" stuff, everything must be "too tight" for things not to go to that extent, however with the way these 6-pins are designed, it's a bit hard for them not to be tight, i mean once you hear the "tick" sound, it's a 99% chance that they are tight enough.

The other possible reason is that the board is bad, it's pulling a lot of current , causing the wires to heat up and it's always the weakest point " the connectors" get burned first, now this could also be a problem with the control board " not handling the voltage requirement correctly" , I am not sure which ( control board / hashing board) is responsible for the "power" part , but which ever is, can very likely be the cause of all this.