Antminer S9 no ethernet link light, but data light blinks, only 10m half duplex

[tim-bc]

Hello all,

Recently I came across a couple antminer s9s that don't seem to be working properly. When I boot them, the yellow ethernet led on the miner never comes up solid, but the green one blinks as usual. On the switch, the status led is orange instead of green. If I log into the switch the connections show as 10m half duplex instead of 1000m full duplex. I can't log into the miner web interface or establish a socket connection to port 4028 on any of them either.

Any ideas?

[1715090649]

1715090649

[1715090649]

1715090649

[philipma1957]

Hello all,

Recently I came across a couple antminer s9s that don't seem to be working properly. When I boot them, the yellow ethernet led on the miner never comes up solid, but the green one blinks as usual. On the switch, the status led is orange instead of green. If I log into the switch the connections show as 10m half duplex instead of 1000m full duplex. I can't log into the miner web interface or establish a socket connection to port 4028 on any of them either.

Any ideas?

Try a high quality cat 7 cable

[ccgllc]

Or even a decent Cat 5.  Bottom, line... likely a broken wire in your ethernet cable.

[philipma1957]

Or even a decent Cat 5.  Bottom, line... likely a broken wire in your ethernet cable.

I have saved a dozen or more s7 and s9 with new cables.

If the run is long cat 7 are better.

But short runs of under 5 meters cat 5 and cat 6 will do