When each S7 is powered on and hashing, please take a look at the S7 from the top. Specially near the PCI-E power plug area. You should see LITTLE RED LED flashing on the hash PCB that is working.
If you can find the hash PCB with no RED LED, that is more than likely the non-hashing PCB.
You can send it to Hong Kong if the unit is still under warranty, or you can send it to USA for repair with fee.
*NOT ALL DAMAGED HASH PCB CAN BE REPAIRED. SOME ARE SIMPLY DEAD AND CAN NOT CPR TO LIFE... (If you see PCB burnt and layers peeling off as example)
Hello:
I currently have 5 s7 rigs, and 2 of them started to show less numbers of basic# and 1 only 2 x.
I updated the firmware, by the way, i didn't know which one to choose and did it with the 700m thinking it is the clock number it had on the previous firmware... but the problem still there.
any help?