Antminer S7 hashing issues

[KingSwizy]

Alright so recently I ordered two antminer S7's. One of them works totally fine at the projected 4.73 TH. On the other hand, This other S7 got to full hashrate and quickly drops. The issue I'm seeing is that the one of the boards falls to start and hash and sometimes makes another board go with it on not hashing. There is still all o's across the asic status but the board never goes above 16 on the temp. I'm not sure what this is considering that there is no x's over the chips and none are missing. Firmware is up to date.

Here is a link to a picture of what it looks like https://imgur.com/a/3hCoE

Hoping to resolve this soon. Thanks!

[1714996047]

1714996047

[MinerMEDIC]

Do us a favor and post your Kernel Log.

[KingSwizy]

Do us a favor and post your Kernel Log.

Nothing is even showing up in my kernel log.

[ricknamer]

Looks more like a power issue than a hash board issue.

[MinerMEDIC]

Do us a favor and post your Kernel Log.

Nothing is even showing up in my kernel log.

Very odd, The controller(and the Kernel Log of it booting) must boot and begin communication with the PIC before you'll see any boards or begin hashing at all.

[fanatic26]

Very odd, The controller(and the Kernel Log of it booting) must boot and begin communication with the PIC before you'll see any boards or begin hashing at all.

S7s depending on firmware do not always show the kernel log properly in the UI. You have to SSH in and look at the physical log file in that case.

[lightfoot]

Do all three boards do this, or just one? How about if you run one board at a time on the controller?

Isolate the problem, always try to isolate the problem.