Quote from: gsupp on February 24, 2015, 12:20:59 AM

Has anyone seen an entire loop on one of their SP20s constantly disabled?

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LOOP[2] OFF TO:0 (test serial failed)
4: disabled (no power to DC2DC)
5: disabled (no power to DC2DC)

And if so, were they able to remedy it without sending the unit back to Spondoolies? I've tried rebooting, power cycling, trying all different versions of the firmware, disabling each ASIC in the loop one by one, etc. I tried contacting support@ and they referred me to their Skype usernames...which is difficult to catch them online due to the time difference and their availability.

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22/02 19:23:54:Loop missing in discovery 2 (code 5)
22/02 21:24:00:Idle board:1
22/02 21:24:00:restart_asics_full (Idle board)
22/02 21:24:00:Testing LOOPs (verbose=0)
22/02 21:24:00:Testing LOOPs done = ret=0
22/02 21:24:00:Loop missing in discovery 2 (code 5)
22/02 21:24:00:Pre read garbage d7e9a02b (0)/int 42114
22/02 21:24:00:Pre read garbage 4ffff43d (1)/int 42114
22/02 21:24:00:Restart ASICS done :)0
22/02 23:53:00:Idle board:1

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Feb 23 23:38:02 miner local1.warn minergate[505]: Critical: Loop missing in discovery 2 (code 5)
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c read word 0x18 0x8b error8
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c write byte 0x18 0x0 = 0x0 error6
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c read word 0x18 0x8e error8
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c error on dc2dc 4:0
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c write byte 0x18 0x2 = 0x12 error6
Feb 23 23:38:02 miner local1.warn minergate[505]: Disabling DC2DC 4 because no ASIC A X
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c read word 0x18 0x8b error8
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c write byte 0x18 0x0 = 0x0 error6
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c read word 0x18 0x8e error8
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c error on dc2dc 5:0
Feb 23 23:38:02 miner local1.warn minergate[505]: i2c write byte 0x18 0x2 = 0x12 error6
Feb 23 23:38:02 miner local1.warn minergate[505]: Disabling DC2DC 5 because no ASIC A X

Do you have another power supply you could try? You may want to switch your cables around and see if the problem moves to another loop.