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Author Topic: Troubleshooting and repair guide for AvalonMiner models 721, 741, 761, 821 & 841  (Read 1751 times)
HagssFIN
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May 14, 2018, 06:54:57 PM
 #41

@mgoz
If you have the skills, you can swap the boards from a good unit to help with the troubleshooting. Presuming of course that this is first approved by Canaan.

And then when you have figured out which board or other component is faulty, you can request Canaan sending you a new spare part.

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May 15, 2018, 01:27:45 AM
 #42

Just caught it right after a crash. It was completely off and noticeably warmer than other units. Let it sit for 15 minutes and cycled PSU. This is what I'm seeing with chip temps and voltages a few minutes after cycling and starting to hash. Don't know if it means anything. Looks like a startup sequence:

Code:
    PVT_T0[-40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 42 42 40 42 41 39]
    PVT_T1[39 43 42 43 43 44 45 45 46 47 51 46 49 51 50 51 53 53 54 54 54 55 54 54 54 53]
    PVT_T2[56 56 56 56 57 57 59 58 59 59 61 61 60 59 62 62 62 63 64 62 63 62 63 62 61 61]
    PVT_T3[60 60 63 63 63 65 64 64 65 66 63 65 82 82 85 84 86 86 89 89 89 90 90 89 89 88]

PVT_V0_0[0 0 0 0 0 0 0 0]
    PVT_V0_1[0 0 0 0 0 0 0 0]
    PVT_V0_2[0 0 0 0 0 0 0 0]
    PVT_V0_3[0 0 0 0 0 0 0 0]
    PVT_V0_4[0 0 0 0 0 0 0 0]
    PVT_V0_5[0 0 0 0 0 0 0 0]
    PVT_V0_6[0 0 0 0 0 0 0 0]
    PVT_V0_7[0 0 0 0 0 0 0 0]
    PVT_V0_8[0 0 0 0 0 0 0 0]
    PVT_V0_9[0 0 0 0 0 0 0 0]
    PVT_V0_10[0 0 0 0 0 0 0 0]
    PVT_V0_11[0 0 0 0 0 0 0 0]
    PVT_V0_12[0 0 0 0 0 0 0 0]
    PVT_V0_13[0 0 0 0 0 0 0 0]
    PVT_V0_14[0 0 0 0 0 0 0 0]
    PVT_V0_15[0 0 0 0 0 0 0 0]
    PVT_V0_16[0 0 0 0 0 0 0 0]
    PVT_V0_17[0 0 0 0 0 0 0 0]
    PVT_V0_18[0 0 0 0 0 0 0 0]
    PVT_V0_19[0 0 0 0 0 0 0 0]
    PVT_V0_20[754 753 0 0 0 0 0 0]
    PVT_V0_21[757 757 398 0 0 0 0 0]
    PVT_V0_22[753 753 293 293 1 0 0 0]
    PVT_V0_23[751 751 407 409 1 903 747 0]
    PVT_V0_24[753 753 373 374 1 895 700 743]
    PVT_V0_25[759 759 330 330 1 903 707 748]
    PVT_V1_0[750 750 327 327 1 894 908 739]
    PVT_V1_1[752 753 440 447 1 897 731 743]
    PVT_V1_2[754 754 306 306 1 902 671 744]
    PVT_V1_3[755 754 408 418 1 899 746 743]
    PVT_V1_4[750 750 326 326 1 898 679 742]
    PVT_V1_5[754 754 363 371 1 894 734 744]
    PVT_V1_6[755 755 413 415 1 900 711 745]
    PVT_V1_7[756 756 307 305 1 900 679 746]
    PVT_V1_8[747 747 312 313 1 898 743 739]
    PVT_V1_9[754 754 324 326 1 900 735 745]
    PVT_V1_10[750 750 442 441 1 902 731 741]
    PVT_V1_11[752 752 371 379 1 901 653 742]
    PVT_V1_12[756 756 359 356 1 898 712 746]
    PVT_V1_13[747 747 409 406 1 898 713 737]
    PVT_V1_14[755 755 355 363 1 889 695 746]
    PVT_V1_15[758 758 359 363 1 903 719 748]
    PVT_V1_16[748 748 364 367 1 903 714 741]
    PVT_V1_17[753 753 371 359 1 896 717 744]
    PVT_V1_18[750 751 367 368 1 892 711 742]
    PVT_V1_19[748 748 374 376 1 898 703 741]
    PVT_V1_20[753 753 354 354 1 897 703 743]
    PVT_V1_21[751 751 359 360 1 897 716 742]
    PVT_V1_22[751 751 362 362 1 893 709 743]
    PVT_V1_23[750 750 353 354 1 897 705 742]
    PVT_V1_24[752 752 353 353 1 900 717 744]
    PVT_V1_25[749 749 360 360 1 898 718 740]
    PVT_V2_0[749 750 368 366 1 907 888 741]
    PVT_V2_1[755 755 362 362 1 902 718 746]
    PVT_V2_2[751 751 365 366 1 904 717 742]
    PVT_V2_3[757 756 352 353 1 902 713 747]
    PVT_V2_4[759 759 351 351 1 906 721 750]
    PVT_V2_5[748 748 355 355 1 898 721 741]
    PVT_V2_6[749 749 362 362 1 899 713 741]
    PVT_V2_7[753 753 358 358 1 903 711 745]
    PVT_V2_8[754 754 350 350 1 902 716 746]
    PVT_V2_9[753 753 362 362 1 895 718 745]
    PVT_V2_10[755 755 363 363 1 901 705 748]
    PVT_V2_11[749 749 357 357 1 908 711 740]
    PVT_V2_12[752 752 358 358 1 899 722 745]
    PVT_V2_13[753 753 359 359 0 901 707 744]
    PVT_V2_14[755 755 355 355 1 904 713 747]
    PVT_V2_15[757 757 352 352 1 899 717 748]
    PVT_V2_16[750 751 363 363 1 896 714 741]
    PVT_V2_17[751 751 360 360 1 904 705 744]
    PVT_V2_18[754 754 359 359 1 898 715 746]
    PVT_V2_19[757 757 359 359 1 894 712 750]
    PVT_V2_20[754 754 364 365 1 897 706 745]
    PVT_V2_21[748 747 358 359 1 891 708 739]
    PVT_V2_22[752 751 365 365 1 899 706 743]
    PVT_V2_23[751 751 363 363 1 892 708 743]
    PVT_V2_24[753 753 367 367 1 901 705 745]
    PVT_V2_25[751 751 376 377 1 896 709 743]
    PVT_V3_0[754 754 362 363 1 905 895 746]
    PVT_V3_1[755 755 361 361 1 897 717 748]
    PVT_V3_2[750 750 363 363 1 898 709 743]
    PVT_V3_3[751 751 358 358 1 899 712 742]
    PVT_V3_4[753 753 359 359 1 900 714 743]
    PVT_V3_5[751 751 371 371 1 897 712 743]
    PVT_V3_6[753 753 359 359 1 895 704 745]
    PVT_V3_7[750 750 358 358 1 895 707 743]
    PVT_V3_8[752 752 349 349 1 898 707 744]
    PVT_V3_9[751 751 356 356 1 901 716 742]
    PVT_V3_10[752 753 352 352 1 899 713 745]
    PVT_V3_11[758 758 356 356 1 902 715 751]
    PVT_V3_12[752 752 361 362 1 900 715 745]
    PVT_V3_13[751 751 350 350 1 895 702 744]
    PVT_V3_14[759 759 391 391 1 903 712 750]
    PVT_V3_15[756 756 335 336 1 900 696 747]
    PVT_V3_16[753 753 345 345 1 900 720 745]
    PVT_V3_17[752 752 343 344 1 897 717 744]
    PVT_V3_18[753 753 368 368 1 895 714 746]
    PVT_V3_19[754 754 357 357 1 899 704 746]
    PVT_V3_20[753 753 355 353 1 903 711 746]
    PVT_V3_21[752 752 346 343 1 898 717 743]
    PVT_V3_22[752 752 355 353 1 901 718 744]
    PVT_V3_23[749 749 356 357 1 897 717 741]
    PVT_V3_24[753 753 367 365 1 898 708 745]
    PVT_V3_25[752 752 361 361 1 900 708 744]


Refreshing 5 seconds later:

Code:
    PVT_T0[62 63 65 66 67 68 68 70 71 70 69 68 68 -40 -40 -40 -40 -40 -40 -40 42 42 40 42 41 39]
    PVT_T1[39 43 42 43 43 44 45 45 46 47 51 46 49 51 50 51 53 53 54 54 54 55 54 54 54 53]
    PVT_T2[56 56 56 56 57 57 59 58 59 59 61 61 60 59 62 62 62 63 64 62 63 62 63 62 61 61]
    PVT_T3[60 60 63 63 63 65 64 64 65 66 63 65 64 64 66 65 66 66 68 67 66 65 65 64 63 61]

    PVT_V0_0[756 756 359 359 1 898 892 747]
    PVT_V0_1[757 757 367 367 1 901 713 748]
    PVT_V0_2[753 753 367 367 1 897 710 744]
    PVT_V0_3[752 752 356 356 1 898 709 743]
    PVT_V0_4[756 756 353 353 1 898 713 748]
    PVT_V0_5[752 752 355 355 1 902 714 745]
    PVT_V0_6[753 753 348 347 1 901 718 745]
    PVT_V0_7[754 754 363 363 1 898 718 746]
    PVT_V0_8[753 752 361 361 1 901 707 743]
    PVT_V0_9[756 757 355 355 1 902 713 747]
    PVT_V0_10[755 755 350 350 1 902 714 746]
    PVT_V0_11[752 752 337 339 1 895 717 744]
    PVT_V0_12[753 753 362 362 1 902 717 746]
    PVT_V0_13[0 0 0 0 0 0 0 0]
    PVT_V0_14[0 0 0 0 0 0 0 0]
    PVT_V0_15[0 0 0 0 0 0 0 0]
    PVT_V0_16[0 0 0 0 0 0 0 0]
    PVT_V0_17[0 0 0 0 0 0 0 0]
    PVT_V0_18[0 0 0 0 0 0 0 0]
    PVT_V0_19[0 0 0 0 0 0 0 0]
    PVT_V0_20[754 753 0 0 0 0 0 0]
    PVT_V0_21[757 757 398 0 0 0 0 0]
    PVT_V0_22[753 753 293 293 1 0 0 0]
    PVT_V0_23[751 751 407 409 1 903 747 0]
    PVT_V0_24[753 753 373 374 1 895 700 743]
    PVT_V0_25[759 759 330 330 1 903 707 748]
    PVT_V1_0[750 750 327 327 1 894 908 739]
    PVT_V1_1[752 753 440 447 1 897 731 743]
    PVT_V1_2[754 754 306 306 1 902 671 744]
    PVT_V1_3[755 754 408 418 1 899 746 743]
    PVT_V1_4[750 750 326 326 1 898 679 742]
    PVT_V1_5[754 754 363 371 1 894 734 744]
    PVT_V1_6[755 755 413 415 1 900 711 745]
    PVT_V1_7[756 756 307 305 1 900 679 746]
    PVT_V1_8[747 747 312 313 1 898 743 739]
    PVT_V1_9[754 754 324 326 1 900 735 745]
    PVT_V1_10[750 750 442 441 1 902 731 741]
    PVT_V1_11[752 752 371 379 1 901 653 742]
    PVT_V1_12[756 756 359 356 1 898 712 746]
    PVT_V1_13[747 747 409 406 1 898 713 737]
    PVT_V1_14[755 755 355 363 1 889 695 746]
    PVT_V1_15[758 758 359 363 1 903 719 748]
    PVT_V1_16[748 748 364 367 1 903 714 741]
    PVT_V1_17[753 753 371 359 1 896 717 744]
    PVT_V1_18[750 751 367 368 1 892 711 742]
    PVT_V1_19[748 748 374 376 1 898 703 741]
    PVT_V1_20[753 753 354 354 1 897 703 743]
    PVT_V1_21[751 751 359 360 1 897 716 742]
    PVT_V1_22[751 751 362 362 1 893 709 743]
    PVT_V1_23[750 750 353 354 1 897 705 742]
    PVT_V1_24[752 752 353 353 1 900 717 744]
    PVT_V1_25[749 749 360 360 1 898 718 740]
    PVT_V2_0[749 750 368 366 1 907 888 741]
    PVT_V2_1[755 755 362 362 1 902 718 746]
    PVT_V2_2[751 751 365 366 1 904 717 742]
    PVT_V2_3[757 756 352 353 1 902 713 747]
    PVT_V2_4[759 759 351 351 1 906 721 750]
    PVT_V2_5[748 748 355 355 1 898 721 741]
    PVT_V2_6[749 749 362 362 1 899 713 741]
    PVT_V2_7[753 753 358 358 1 903 711 745]
    PVT_V2_8[754 754 350 350 1 902 716 746]
    PVT_V2_9[753 753 362 362 1 895 718 745]
    PVT_V2_10[755 755 363 363 1 901 705 748]
    PVT_V2_11[749 749 357 357 1 908 711 740]
    PVT_V2_12[752 752 358 358 1 899 722 745]
    PVT_V2_13[753 753 359 359 0 901 707 744]
    PVT_V2_14[755 755 355 355 1 904 713 747]
    PVT_V2_15[757 757 352 352 1 899 717 748]
    PVT_V2_16[750 751 363 363 1 896 714 741]
    PVT_V2_17[751 751 360 360 1 904 705 744]
    PVT_V2_18[754 754 359 359 1 898 715 746]
    PVT_V2_19[757 757 359 359 1 894 712 750]
    PVT_V2_20[754 754 364 365 1 897 706 745]
    PVT_V2_21[748 747 358 359 1 891 708 739]
    PVT_V2_22[752 751 365 365 1 899 706 743]
    PVT_V2_23[751 751 363 363 1 892 708 743]
    PVT_V2_24[753 753 367 367 1 901 705 745]
    PVT_V2_25[751 751 376 377 1 896 709 743]
    PVT_V3_0[754 754 362 363 1 905 895 746]
    PVT_V3_1[755 755 361 361 1 897 717 748]
    PVT_V3_2[750 750 363 363 1 898 709 743]
    PVT_V3_3[751 751 358 358 1 899 712 742]
    PVT_V3_4[753 753 359 359 1 900 714 743]
    PVT_V3_5[751 751 371 371 1 897 712 743]
    PVT_V3_6[753 753 359 359 1 895 704 745]
    PVT_V3_7[750 750 358 358 1 895 707 743]
    PVT_V3_8[752 752 349 349 1 898 707 744]
    PVT_V3_9[751 751 356 356 1 901 716 742]
    PVT_V3_10[752 753 352 352 1 899 713 745]
    PVT_V3_11[758 758 356 356 1 902 715 751]
    PVT_V3_12[753 753 364 364 1 900 714 745]
    PVT_V3_13[751 751 357 357 1 895 703 744]
    PVT_V3_14[759 759 393 394 1 904 710 750]
    PVT_V3_15[756 756 346 346 1 900 697 747]
    PVT_V3_16[754 754 353 353 1 900 717 745]
    PVT_V3_17[752 752 353 353 1 897 715 744]
    PVT_V3_18[754 754 370 370 1 896 711 746]
    PVT_V3_19[754 754 362 361 1 899 703 746]
    PVT_V3_20[753 753 358 359 1 904 710 746]
    PVT_V3_21[752 752 349 350 1 898 717 743]
    PVT_V3_22[752 752 359 359 1 901 717 744]
    PVT_V3_23[749 748 361 361 1 897 716 740]
    PVT_V3_24[754 754 364 364 1 899 710 745]
    PVT_V3_25[753 753 364 364 1 900 711 743]


Refreshing again:

Code:
    PVT_T0[69 70 72 73 75 76 75 78 78 78 77 76 76 78 78 75 76 76 77 77 77 75 72 72 70 70]
    PVT_T1[70 71 72 74 75 75 76 77 77 77 78 77 77 80 81 79 79 77 78 76 75 74 72 71 69 67]
    PVT_T2[71 71 71 72 73 73 76 76 76 77 79 79 78 77 79 78 78 78 78 76 76 75 75 73 71 71]
    PVT_T3[70 70 73 73 73 75 75 76 76 77 74 77 76 76 78 75 77 76 78 76 74 73 73 71 70 68]

   PVT_V0_0[756 756 359 359 1 898 890 747]
    PVT_V0_1[757 757 371 370 1 900 713 748]
    PVT_V0_2[753 753 368 368 1 897 708 744]
    PVT_V0_3[752 752 356 356 1 898 707 743]
    PVT_V0_4[756 756 353 353 1 898 712 748]
    PVT_V0_5[752 752 354 354 1 902 713 745]
    PVT_V0_6[753 753 345 345 1 900 718 745]
    PVT_V0_7[754 754 361 361 1 898 719 746]
    PVT_V0_8[753 753 359 359 1 901 707 743]
    PVT_V0_9[756 756 353 353 1 902 713 747]
    PVT_V0_10[755 755 346 346 1 902 715 746]
    PVT_V0_11[752 752 333 335 1 895 718 744]
    PVT_V0_12[753 753 359 359 1 902 720 746]
    PVT_V0_13[749 749 361 361 1 902 706 742]
    PVT_V0_14[752 752 350 350 1 898 712 743]
    PVT_V0_15[755 754 330 330 1 903 712 746]
    PVT_V0_16[755 755 350 350 1 903 729 746]
    PVT_V0_17[752 752 351 351 1 902 716 744]
    PVT_V0_18[749 749 368 368 1 900 716 742]
    PVT_V0_19[751 752 360 360 1 899 709 744]
    PVT_V0_20[753 753 365 365 0 900 709 745]
    PVT_V0_21[756 756 369 369 1 905 709 746]
    PVT_V0_22[753 752 371 371 1 896 712 744]
    PVT_V0_23[750 750 363 363 1 903 702 743]
    PVT_V0_24[753 753 348 348 1 895 715 745]
    PVT_V0_25[758 758 370 371 1 903 714 750]
    PVT_V1_0[750 750 406 404 1 894 894 742]
    PVT_V1_1[752 752 357 357 1 897 686 745]
    PVT_V1_2[754 754 362 362 1 902 712 746]
    PVT_V1_3[754 754 357 357 1 898 712 745]
    PVT_V1_4[750 750 353 353 1 898 712 744]
    PVT_V1_5[753 753 362 362 1 893 713 746]
    PVT_V1_6[754 754 349 349 1 900 705 747]
    PVT_V1_7[756 756 345 345 1 900 715 748]
    PVT_V1_8[747 747 363 365 1 898 718 740]
    PVT_V1_9[753 753 340 337 1 900 706 746]
    PVT_V1_10[750 750 351 351 1 902 722 742]
    PVT_V1_11[751 751 347 354 1 900 717 743]
    PVT_V1_12[755 755 341 340 1 898 712 747]
    PVT_V1_13[746 746 360 360 1 898 714 739]
    PVT_V1_14[754 754 344 343 1 889 706 746]
    PVT_V1_15[758 758 346 346 1 903 708 749]
    PVT_V1_16[748 748 342 342 1 903 718 742]
    PVT_V1_17[753 753 350 350 1 896 723 745]
    PVT_V1_18[750 751 362 361 1 892 711 743]
    PVT_V1_19[748 748 374 374 1 897 703 742]
    PVT_V1_20[752 752 353 353 1 897 702 743]
    PVT_V1_21[751 751 352 352 1 896 714 742]
    PVT_V1_22[751 751 364 365 1 892 711 743]
    PVT_V1_23[749 749 352 352 1 897 702 742]
    PVT_V1_24[752 752 363 363 1 900 715 744]
    PVT_V1_25[749 749 359 359 1 898 712 741]
    PVT_V2_0[749 749 373 373 1 907 885 742]
    PVT_V2_1[755 755 368 368 1 902 713 746]
    PVT_V2_2[750 750 370 370 1 904 713 742]
    PVT_V2_3[756 756 353 353 1 902 709 747]
    PVT_V2_4[759 759 347 347 1 905 719 750]
    PVT_V2_5[748 748 355 355 1 897 722 741]
    PVT_V2_6[749 749 359 359 1 898 711 742]
    PVT_V2_7[753 752 353 353 1 902 711 745]
    PVT_V2_8[754 754 341 341 1 902 717 746]
    PVT_V2_9[753 753 354 354 1 895 721 745]
    PVT_V2_10[755 755 354 354 1 901 708 748]
    PVT_V2_11[749 748 347 346 1 907 712 740]
    PVT_V2_12[752 752 349 350 1 898 725 745]
    PVT_V2_13[752 752 351 352 0 897 709 744]
    PVT_V2_14[755 755 344 344 1 904 715 747]
    PVT_V2_15[757 757 344 344 1 899 721 748]
    PVT_V2_16[750 750 358 358 1 896 716 742]
    PVT_V2_17[751 751 353 352 1 904 706 744]
    PVT_V2_18[754 754 354 354 1 898 718 746]
    PVT_V2_19[757 757 355 355 1 894 713 749]
    PVT_V2_20[754 754 365 365 1 897 707 745]
    PVT_V2_21[748 748 361 361 1 891 707 739]
    PVT_V2_22[751 751 366 367 1 899 703 743]
    PVT_V2_23[751 751 365 365 1 891 706 743]
    PVT_V2_24[753 753 371 371 1 901 703 745]
    PVT_V2_25[751 751 381 381 1 896 707 744]
    PVT_V3_0[754 754 368 368 1 905 893 746]
    PVT_V3_1[755 755 364 364 1 897 714 748]
    PVT_V3_2[750 750 364 364 1 898 707 743]
    PVT_V3_3[751 751 356 356 1 899 711 742]
    PVT_V3_4[753 753 361 361 1 900 714 744]
    PVT_V3_5[751 751 374 375 1 896 710 743]
    PVT_V3_6[753 753 359 359 1 895 701 745]
    PVT_V3_7[750 750 354 354 1 895 706 743]
    PVT_V3_8[752 752 343 343 1 898 708 744]
    PVT_V3_9[751 751 351 351 1 900 718 742]
    PVT_V3_10[752 752 345 345 1 899 714 745]
    PVT_V3_11[758 758 351 351 1 902 718 751]
    PVT_V3_12[753 753 361 361 1 900 716 745]
    PVT_V3_13[751 751 349 349 1 895 703 743]
    PVT_V3_14[759 759 389 389 1 904 713 750]
    PVT_V3_15[756 756 339 339 1 900 699 747]
    PVT_V3_16[754 754 347 347 1 900 720 745]
    PVT_V3_17[752 752 348 348 1 897 717 744]
    PVT_V3_18[754 754 368 368 1 896 713 746]
    PVT_V3_19[754 754 358 358 1 899 704 746]
    PVT_V3_20[753 753 357 357 1 904 711 746]
    PVT_V3_21[752 752 349 349 1 898 717 743]
    PVT_V3_22[752 752 359 359 1 901 716 744]
    PVT_V3_23[749 748 363 363 1 897 715 740]
    PVT_V3_24[754 754 367 367 1 898 709 746]
    PVT_V3_25[753 753 367 367 1 900 708 744]
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May 15, 2018, 01:37:59 PM
 #43

There seems to be something wrong with one of your hash boards.

Hash Board #0.

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May 15, 2018, 03:56:36 PM
 #44

Those values might be part of some startup sequence. It crashed again overnight. The 0 and -40 values seem to cycle through all of the chips on all boards for about the first 10 minutes of hashing. After it goes through all, values look normal. I haven't checked other machines to see if they do it as well. Not getting anywhere with Canaan support still. Have been sending them logs of when it's crashed and after it's rebooted, and they say it's fine. Machine powers off entirely, gets removed from cgminer, and there's nothing in logs when crashed.
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May 15, 2018, 06:40:56 PM
 #45

I have been having the exact same issue and have had some success with taking off the back cover plate and using compressed air to clean dust off of the boards.

Thanks, another just dropped too. No word from Canaan yet, if anyone has seen this before please let me know. If I physically power cycle it will start mining again, sometimes for days before dropping out of CGMiner.

Code:
MM ID4=Ver[8411803-14b0f10]
    DNA[013cd3418c3342bf]
    Elapsed[21]
    MW[0 0 0 0]
    LW[0]
    MH[0 0 0 0]
    HW[0]
    Temp[27]
    TMax[27]
    Fan[0]
    FanR[100%]
    Vi[1212 1212 1218 1218]
    Vo[29 32 40 39]
    PLL0[0 0 0 0]
    PLL1[0 0 0 0]
    PLL2[0 0 0 0]
    PLL3[0 0 0 0]
    GHSmm[0.00]
    WU[0.00]
    Freq[0.00]
    PG[0]
    Led[0]
    MW0[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
    MW1[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
    MW2[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
    MW3[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
    TA[104]
    ECHU[513 513 513 513]
    ECMM[197]
    FAC0[4]
    OC[0]
    SF0[0 0 0 775]
    SF1[0 0 0 775]
    SF2[0 0 0 775]
    SF3[0 0 0 775]
    PMUV[0000 0000]
    PVT_T0[-273 -273 -273 -273 -273 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40]
    PVT_T1[-273 -273 -273 -273 -273 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40]
    PVT_T2[-40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40]
    PVT_T3[-273 -273 -273 -273 -273 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40 -40]
    PVT_V0_0[0 0 0 0 0 0 0 0]
    PVT_V0_1[0 0 0 0 0 0 0 0]
    PVT_V0_2[0 0 0 0 0 0 0 0]
    PVT_V0_3[0 0 0 0 0 0 0 0]
    PVT_V0_4[0 0 0 0 0 0 0 0]
    PVT_V0_5[0 0 0 0 0 0 0 0]
    PVT_V0_6[0 0 0 0 0 0 0 0]
    PVT_V0_7[0 0 0 0 0 0 0 0]
    PVT_V0_8[0 0 0 0 0 0 0 0]
    PVT_V0_9[0 0 0 0 0 0 0 0]
    PVT_V0_10[0 0 0 0 0 0 0 0]
    PVT_V0_11[0 0 0 0 0 0 0 0]
    PVT_V0_12[0 0 0 0 0 0 0 0]
    PVT_V0_13[0 0 0 0 0 0 0 0]
    PVT_V0_14[0 0 0 0 0 0 0 0]
    PVT_V0_15[0 0 0 0 0 0 0 0]
    PVT_V0_16[0 0 0 0 0 0 0 0]
    PVT_V0_17[0 0 0 0 0 0 0 0]
    PVT_V0_18[0 0 0 0 0 0 0 0]
    PVT_V0_19[0 0 0 0 0 0 0 0]
    PVT_V0_20[0 0 0 0 0 0 0 0]
    PVT_V0_21[0 0 0 0 0 0 0 0]
    PVT_V0_22[0 0 0 0 0 0 0 0]
    PVT_V0_23[0 0 0 0 0 0 0 0]
    PVT_V0_24[0 0 0 0 0 0 0 0]
    PVT_V0_25[0 0 0 0 0 0 0 0]
    PVT_V1_0[0 0 0 0 0 0 0 0]
    PVT_V1_1[0 0 0 0 0 0 0 0]
    PVT_V1_2[0 0 0 0 0 0 0 0]
    PVT_V1_3[0 0 0 0 0 0 0 0]
    PVT_V1_4[0 0 0 0 0 0 0 0]
    PVT_V1_5[0 0 0 0 0 0 0 0]
    PVT_V1_6[0 0 0 0 0 0 0 0]
    PVT_V1_7[0 0 0 0 0 0 0 0]
    PVT_V1_8[0 0 0 0 0 0 0 0]
    PVT_V1_9[0 0 0 0 0 0 0 0]
    PVT_V1_10[0 0 0 0 0 0 0 0]
    PVT_V1_11[0 0 0 0 0 0 0 0]
    PVT_V1_12[0 0 0 0 0 0 0 0]
    PVT_V1_13[0 0 0 0 0 0 0 0]
    PVT_V1_14[0 0 0 0 0 0 0 0]
    PVT_V1_15[0 0 0 0 0 0 0 0]
    PVT_V1_16[0 0 0 0 0 0 0 0]
    PVT_V1_17[0 0 0 0 0 0 0 0]
    PVT_V1_18[0 0 0 0 0 0 0 0]
    PVT_V1_19[0 0 0 0 0 0 0 0]
    PVT_V1_20[0 0 0 0 0 0 0 0]
    PVT_V1_21[0 0 0 0 0 0 0 0]
    PVT_V1_22[0 0 0 0 0 0 0 0]
    PVT_V1_23[0 0 0 0 0 0 0 0]
    PVT_V1_24[0 0 0 0 0 0 0 0]
    PVT_V1_25[0 0 0 0 0 0 0 0]
    PVT_V2_0[0 0 0 0 0 0 0 0]
    PVT_V2_1[0 0 0 0 0 0 0 0]
    PVT_V2_2[0 0 0 0 0 0 0 0]
    PVT_V2_3[0 0 0 0 0 0 0 0]
    PVT_V2_4[0 0 0 0 0 0 0 0]
    PVT_V2_5[0 0 0 0 0 0 0 0]
    PVT_V2_6[0 0 0 0 0 0 0 0]
    PVT_V2_7[0 0 0 0 0 0 0 0]
    PVT_V2_8[0 0 0 0 0 0 0 0]
    PVT_V2_9[0 0 0 0 0 0 0 0]
    PVT_V2_10[0 0 0 0 0 0 0 0]
    PVT_V2_11[0 0 0 0 0 0 0 0]
    PVT_V2_12[0 0 0 0 0 0 0 0]
    PVT_V2_13[0 0 0 0 0 0 0 0]
    PVT_V2_14[0 0 0 0 0 0 0 0]
    PVT_V2_15[0 0 0 0 0 0 0 0]
    PVT_V2_16[0 0 0 0 0 0 0 0]
    PVT_V2_17[0 0 0 0 0 0 0 0]
    PVT_V2_18[0 0 0 0 0 0 0 0]
    PVT_V2_19[0 0 0 0 0 0 0 0]
    PVT_V2_20[0 0 0 0 0 0 0 0]
    PVT_V2_21[0 0 0 0 0 0 0 0]
    PVT_V2_22[0 0 0 0 0 0 0 0]
    PVT_V2_23[0 0 0 0 0 0 0 0]
    PVT_V2_24[0 0 0 0 0 0 0 0]
    PVT_V2_25[0 0 0 0 0 0 0 0]
    PVT_V3_0[0 0 0 0 0 0 0 0]
    PVT_V3_1[0 0 0 0 0 0 0 0]
    PVT_V3_2[0 0 0 0 0 0 0 0]
    PVT_V3_3[0 0 0 0 0 0 0 0]
    PVT_V3_4[0 0 0 0 0 0 0 0]
    PVT_V3_5[0 0 0 0 0 0 0 0]
    PVT_V3_6[0 0 0 0 0 0 0 0]
    PVT_V3_7[0 0 0 0 0 0 0 0]
    PVT_V3_8[0 0 0 0 0 0 0 0]
    PVT_V3_9[0 0 0 0 0 0 0 0]
    PVT_V3_10[0 0 0 0 0 0 0 0]
    PVT_V3_11[0 0 0 0 0 0 0 0]
    PVT_V3_12[0 0 0 0 0 0 0 0]
    PVT_V3_13[0 0 0 0 0 0 0 0]
    PVT_V3_14[0 0 0 0 0 0 0 0]
    PVT_V3_15[0 0 0 0 0 0 0 0]
    PVT_V3_16[0 0 0 0 0 0 0 0]
    PVT_V3_17[0 0 0 0 0 0 0 0]
    PVT_V3_18[0 0 0 0 0 0 0 0]
    PVT_V3_19[0 0 0 0 0 0 0 0]
    PVT_V3_20[0 0 0 0 0 0 0 0]
    PVT_V3_21[0 0 0 0 0 0 0 0]
    PVT_V3_22[0 0 0 0 0 0 0 0]
    PVT_V3_23[0 0 0 0 0 0 0 0]
    PVT_V3_24[0 0 0 0 0 0 0 0]
    PVT_V3_25[0 0 0 0 0 0 0 0]
    FM[1]
    CRC[0 0 0 0],MM Count=4,Smart Speed=1,Connecter=AUC,AUC VER=AUC-20151208,AUC I2C Speed=400000,AUC I2C XDelay=19200,AUC Sensor=15225,AUC Temperature=28.99,Connection Overloaded=false,Voltage Level Offset=0,Nonce Mask=24,USB Pipe=0,USB Delay=r0 0.000000 w0 0.000000,USB tmo=0 0|STATS=3,ID=POOL0,Elapsed=200,Calls=0,Wait=0.000000,Max=0.000000,Min=99999999.000000,Pool Calls=0,Pool Attempts=0,Pool Wait=0.000000,Pool Max=0.000000,Pool Min=99999999.000000,Pool Av=0.000000,Work Had Roll Time=false,Work Can Roll=false,Work Had Expire=false,Work Roll Time=0,Work Diff=80702.00000000,Min Diff=4098.00000000,Max Diff=80702.00000000,Min Diff Count=969,Max Diff Count=6109,Times Sent=214,Bytes Sent=27819,Times Recv=226,Bytes Recv=18122,Net Bytes Sent=27819,Net Bytes Recv=18122|STATS=4,ID=POOL1,Elapsed=200,Calls=0,Wait=0.000000,Max=0.000000,Min=99999999.000000,Pool Calls=0,Pool Attempts=0,Pool Wait=0.000000,Pool Max=0.000000,Pool Min=99999999.000000,Pool Av=0.000000,Work Had Roll Time=false,Work Can Roll=false,Work Had Expire=false,Work Roll Time=0,Work Diff=0.00000000,Min Diff=0.00000000,Max Diff=0.00000000,Min Diff Count=0,Max Diff Count=0,Times Sent=2,Bytes Sent=145,Times Recv=5,Bytes Recv=1529,Net Bytes Sent=145,Net Bytes Recv=1529|STATS=5,ID=POOL2,Elapsed=200,Calls=0,Wait=0.000000,Max=0.000000,Min=99999999.000000,Pool Calls=0,Pool Attempts=0,Pool Wait=0.000000,Pool Max=0.000000,Pool Min=99999999.000000,Pool Av=0.000000,Work Had Roll Time=false,Work Can Roll=false,Work Had Expire=false,Work Roll Time=0,Work Diff=0.00000000,Min Diff=0.00000000,Max Diff=0.00000000,Min Diff Count=0,Max Diff Count=0,Times Sent=2,Bytes Sent=145,Times Recv=4,Bytes Recv=1588,Net Bytes Sent=145,Net Bytes Recv=1588|'
[STATUS] =>
(
   [STATUS] => S
   [When] => 1525234353
   [Code] => 70
   [Msg] => CGMiner stats
   [Description] => cgminer 4.10.0
)
[STATS0] =>
(
   [STATS] => 0
   [ID] => AV80
   [Elapsed] => 200
   [Calls] => 0
   [Wait] => 0.000000
   [Max] => 0.000000
   [Min] => 99999999.000000
[/code]
mgoz
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May 18, 2018, 02:02:38 PM
 #46

Just an update that support had me swap MM boards between working and crashing unit. Same unit still crashing. Last night I was monitoring temperatures and fan speed, saw nothing abnormal, and unit suddenly disappeared from cgminer. Checked it and it was entirely off. Going to try swapping fans tonight, but starting to think repeated overheating from fan reporting 0RPM/100% has already done more damage. Previously it would sit in idle status after crashing and now power is cut entirely.
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May 18, 2018, 02:41:36 PM
 #47

@mgoz  I have a strong gut feeling that your cooling fan is faulty.

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May 19, 2018, 08:32:55 PM
 #48

@mgoz  I have a strong gut feeling that your cooling fan is faulty.

Seems to be the case. Swapped fans last night and finally witnessed crash. Other unit that's had no issue just reported fan spinning at 0RPM/100%. Fan was stopped. Went into idle status with yellow LED and chips began to overheat to over 100C. Right before fan stopped, crashed unit was reporting fan at 5790RPM/100% with other unit reporting 5820/98%. Intake and exhaust temps were 24/69C.
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June 09, 2018, 08:17:16 PM
 #49

Thanks for the guide, most helpful. I am trying to improve cost per t/h I can use the frequency command to slow things down but the kwh per th is worse than just running on standard settings. I cannot get the -avalon7-voltage-level 12 command to work the miner does not run at all. Any ideas?
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June 11, 2018, 07:24:56 PM
 #50

Thanks for the guide, most helpful. I am trying to improve cost per t/h I can use the frequency command to slow things down but the kwh per th is worse than just running on standard settings. I cannot get the -avalon7-voltage-level 12 command to work the miner does not run at all. Any ideas?
And what miner are you using it on? It only works with an A721 or A741, the A8's have a different format. Did you use the double '--' or just a single '-'? the commands must start with --
I use: --api-listen --avalon7-voltage-level 12 in conjunction with a Voltage Offset of either -1 or -2.

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August 08, 2018, 08:06:20 PM
 #51

One of my A741's is hashing 2THs slower than its brethren. Looking at the logs in its section I see:
    MW0[12 11 19 14 26 25 23 24 20 15 20 17 15 16 20 21 13 23 18 12 20 18]
    MW1[17 19 25 18 19 27 23 22 23 18 18 19 19 17 17 19 24 21 18 21 17 18]
    MW2[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
    MW3[12 16 22 32 18 20 18 15 22 15 15 23 21 19 18 21 27 21 25 21 17 24]

I take it I've lost a module? Which one so I can try a swap to verify and let Canaan know I need a Warranty replacement for it.

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August 09, 2018, 04:24:24 AM
 #52

@NotFuzzyWarm

Yeah it looks like one of the four hash boards is bad (#2).

Check out the picture right above the chapter three title.

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August 09, 2018, 02:44:41 PM
 #53

Got it. Since Blokforge has 841's for $599 I picked up another to replace this 741 when I later take it offline for repair. Haggs, since the A7's are past EOL and out of production, when you were at Canaan did they say anything as to how long they will support the 721/741's with replacement hash boards?

Gotta love when Electronic and Mechanical engineers insist on using their own numbering styles: "MW2" which is actually the 3rd board...

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August 09, 2018, 05:02:21 PM
 #54

Gotta love when Electronic and Mechanical engineers insist on using their own numbering styles: "MW2" which is actually the 3rd board...

Not really their own numbering style. It's zero-based numbering, which is used in almost every programming language since C.  Wink
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August 09, 2018, 05:41:35 PM
 #55

ya I know. Point still is that for clear customer-level documentation it should be harmonized one way or the other.

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August 09, 2018, 09:35:01 PM
 #56

Better marking would also help it.
So when you open it, you could clearly see which is board 0, 1, 2 and 3.

If I remember right, I think that Canaan should have spare parts available for at least two years after the miner release.

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August 10, 2018, 02:17:12 AM
 #57

Quick question: I'll find out when I get the replacement 841 next week sometime and open up the 741 but you mention repasting the chips - but only the top side. What does the back of the boards look like? Bare filled thermal vias (bumps) w/paste directly against the large back side heat sinks or is there layer of TIM between board and heatsink?

When repasting the top side of chips and their smaller heat sink, any reason not to do the backside as well? Aside from needing to when doing board swaps of course.

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August 10, 2018, 04:29:21 PM
 #58

Haha, same boat NotFuzzy.

One of my 741's has a board down. I haven't pulled it to play around and see if it's just the board or PMU yet. You should be able to test that by swapping the board positions on that one blade, to differentiate.

I still have the dead boards from the 841 video I shot I'll clean off the old paste to give a clear picture of what the back of the board looks like. From what I remember they appeared to be flat, but I can't be sure with the paste having already been applied.

I haven't checked with Canaan, but when they sent out the replacement boards for the 841, they sent them pre-pasted (back and chips). I think that is how they plan to send out replacement boards.

Edit: Image of the flat metal surface the board is "laminated" to. I couldn't get a clear image of the side view showing the mating of the surfaces.


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August 10, 2018, 08:35:35 PM
 #59

Cool. Sounds/looks like they are using TLam(R) which is an aluminum-backed circuit board material made just for high power apps like this. Once again, as with the heat sink design just goes to show that Canaan has some pretty sharp designers. Cheesy

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August 16, 2018, 05:56:36 AM
 #60

^^ Thanks I learned something new.

I figured I'd reach out to Canaan in regards to sourcing parts for the 741. There advice is to email them - rma@canaan.io - This is to ensure you are requesting the right replacement part.

Sounds like they have a lot of 741's still kicking around. When I spoke with them they did suggest it may be beneficial to just purchase an entire unit. This made sense as you would essentially have a spare for anything that can fail. Not sure what the pricing is on any spare parts as all miners will be outside of the warranty period.

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