Καλησπέρα φίλοι μου είμαι σχετικά νέος στο asic mining. Έχω ένα a1. Με προσέγγισε μέσω του fb ένας κινέζος προμηθευτής, και μιλάμε για κάποιο καιρό(ο jack αν τον γνωρίζετε έχει σελίδα στο fb και προωθεί αρκετά τα προιόντα του). Μου έκανε κάποιες προτάσεις αλλά αυτό που δεν ξέρω είναι τι πληρώνω εδώ, και πως θα κινηθώ έτσι ώστε να έχω γρήγορα τα προιόντα έτσι ώστε να μην χάνω κέρδος. Μου είπε ότι για δύο Miners που συνολικά θα κοστίσουν 660 δολάρια, θα πληρώσω 290 δολάρια συνολικά για να μου έρθουν. Ένας φίλος μου μου είπε ότι δεν υπάρχει περίπτωση να πληρώσω τόσα λίγα. Τι φόρους και δασμούς πληρώνω; Τα 290 μήπως αφορούν μόνο τη μεταφορά; Του είπα θέλω το συνολικό κόστος για να έρθουν σπίτι μου. Πως βγαίνουν οι φόροι και οι δασμοί; Τα 290 εξτρα για αυτά που θα πάρω σας φαίνεται λογικό ποσό; Ευχαριστω!

if found out that the wire wasnt good, so i replaced it. But the 4 hashbord heat the wire melt, so i found another hashboard and everything is fine. What is the second mode?

Hello friends i am new at mining. One of my cards on my a1 suddently stopped hashing(seems 0mh). I reboot my machine and i only see three cards(chains). I saw the log file and i thin i detect the problem, but i cant understand what it really is.

First a problem with chain 1
chain1: power down
Apr 06 04:28:52 rockchip cgminer[286]: fan0 speed:5760, fan1 speed:5880
Apr 06 04:28:53 rockchip cgminer[286]: chain1: encore first mode
Apr 06 04:28:56 rockchip cgminer[286]: dm_compat.c,5164: poll fail !
Apr 06 04:28:56 rockchip cgminer[286]: spi_cmd_reset poll fail !
Apr 06 04:28:56 rockchip cgminer[286]: failed to reset chain 1!,try again
Apr 06 04:28:57 rockchip cgminer[286]: fan0 speed:5820, fan1 speed:5880
Apr 06 04:28:59 rockchip cgminer[286]: dm_compat.c,5164: poll fail !
Apr 06 04:28:59 rockchip cgminer[286]: spi_cmd_reset poll fail !
Apr 06 04:28:59 rockchip cgminer[286]: failed to reset chain 1!,try again
Apr 06 04:29:02 rockchip cgminer[286]: dm_compat.c,5164: poll fail !
Apr 06 04:29:02 rockchip cgminer[286]: spi_cmd_reset poll fail !
Apr 06 04:29:02 rockchip cgminer[286]: failed to reset chain 1!,try again
Apr 06 04:29:02 rockchip cgminer[286]: fan0 speed:5790, fan1 speed:5820
Apr 06 04:29:05 rockchip cgminer[286]: dm_compat.c,5164: poll fail !
Apr 06 04:29:05 rockchip cgminer[286]: spi_cmd_reset poll fail !
.
.what is first and second mode?
.
chain1: encore second mode                          
Apr 06 04:29:17 rockchip cgminer[286]: fan0 speed:5790, fan1 speed:5820
Apr 06 04:29:21 rockchip cgminer[286]: dm_compat.c,5164: poll fail !
Apr 06 04:29:21 rockchip cgminer[286]: spi_cmd_reset poll fail !
Apr 06 04:29:21 rockchip cgminer[286]: failed to reset chain 1!,try again
Apr 06 04:29:22 rockchip cgminer[286]: fan0 speed:5850, fan1 speed:5880
Apr 06 04:29:24 rockchip cgminer[286]: 1: detected 72 chips
Apr 06 04:29:24 rockchip cgminer[286]: collect core success
Apr 06 04:29:24 rockchip cgminer[286]: chain1: pre init OK, retries:1
.
.and at the same session problem but with chain 3(only one card is off)
.first 54 ppls set ok
Apr 06 05:39:16 rockchip cgminer[292]: Chain 3 VID 0 voltage 410.6
Apr 06 05:39:16 rockchip cgminer[292]: Chain 3 unable to get above target voltage 425 by VID 0
Apr 06 05:39:16 rockchip cgminer[292]: B1 chain[3] set pll, start_pll:54, target_pll:120
Apr 06 05:39:16 rockchip cgminer[292]: T1 3 set default 54 PLL success
Apr 06 05:39:16 rockchip cgminer[292]: T1 3 set default 55 PLL success
.
.all between ppls are ok
.
Apr 06 05:39:21 rockchip cgminer[292]: T1 3 set default 91 PLL success
Apr 06 05:39:21 rockchip cgminer[292]: T1 3 set default 92 PLL success
Apr 06 05:39:21 rockchip cgminer[292]: T1 3 set default 93 PLL success
Apr 06 05:39:21 rockchip cgminer[292]: T1 3 set default 94 PLL success
Apr 06 05:39:21 rockchip cgminer[292]: dm_compat.c,5164: poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_write_register poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: Failed to set PLL Lv.95 on T1 3 in T1_SetT1PLLClock
Apr 06 05:39:21 rockchip cgminer[292]: set default PLL fail
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_read_write_reg0d poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_read_register poll fail !
.
.same error multiple times
.
Apr 06 05:39:21 rockchip cgminer[292]: dm_compat.c,5164: poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_write_register poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: chain3 find_chain_vid: start_vid = 0, target_volt = 407
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_read_register poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: failed to read voltage for chain3 chip1
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_read_register poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: failed to read voltage for chain3 chip2
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_read_register poll fail !
.
.
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_read_register poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: failed to read voltage for chain3 chip70
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_read_register poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: failed to read voltage for chain3 chip71
Apr 06 05:39:21 rockchip cgminer[292]: spi_cmd_read_register poll fail !
Apr 06 05:39:21 rockchip cgminer[292]: failed to read voltage for chain3 chip72
Apr 06 05:39:21 rockchip cgminer[292]: Chain 3 VID 0 voltage nan
Apr 06 05:39:23 rockchip cgminer[292]: spi_cmd_read_register poll fail !
.
.72 chips fails again
.
Apr 06 05:39:24 rockchip cgminer[292]: Chain 3 VID 0 voltage nan
Apr 06 05:39:24 rockchip cgminer[292]: spi_cmd_read_register poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: dm_compat.c,5164: poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: spi_cmd_write_register poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: dm_compat.c,5164: poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: spi_cmd_write_register poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: dm_compat.c,5164: poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: spi_cmd_write_register poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: dm_compat.c,5164: poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: spi_cmd_write_register poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: dm_compat.c,5164: poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: spi_cmd_write_register poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: dm_compat.c,5164: poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: spi_cmd_write_register poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: dm_compat.c,5164: poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: spi_cmd_write_register poll fail !
Apr 06 05:39:24 rockchip cgminer[292]: fan0 speed:5790, fan1 speed:6240
Apr 06 05:39:25 rockchip cgminer[292]: chain_detect: chain: 0, n_chips: 0
Apr 06 05:39:26 rockchip cgminer[292]: Chain 0 Voltage information. Highest Vol:435, Average Vol:416, Lowest Vol:402
Apr 06 05:39:26 rockchip cgminer[292]: 0: found 72 chips with total 2304 active cores
Apr 06 05:39:27 rockchip cgminer[292]: Chain 0 Post Balance Voltage. Highest Vol:435.000000, Average Vol:416.000000, Lowest Vol:400.000000.
Apr 06 05:39:28 rockchip cgminer[292]: chain_detect: chain: 1, n_chips: 0
Apr 06 05:39:28 rockchip cgminer[292]: Chain 1 Voltage information. Highest Vol:438, Average Vol:419, Lowest Vol:397
Apr 06 05:39:29 rockchip cgminer[292]: 1: found 72 chips with total 2304 active cores
Apr 06 05:39:29 rockchip cgminer[292]: Chain 1 Post Balance Voltage. Highest Vol:438.000000, Average Vol:419.000000, Lowest Vol:397.000000.
Apr 06 05:39:29 rockchip cgminer[292]: fan0 speed:5880, fan1 speed:6210
Apr 06 05:39:30 rockchip cgminer[292]: chain_detect: chain: 2, n_chips: 0
Apr 06 05:39:31 rockchip cgminer[292]: Chain 2 Voltage information. Highest Vol:435, Average Vol:414, Lowest Vol:397
Apr 06 05:39:31 rockchip cgminer[292]: 2: found 72 chips with total 2304 active cores
Apr 06 05:39:32 rockchip cgminer[292]: Chain 2 Post Balance Voltage. Highest Vol:435.000000, Average Vol:414.000000, Lowest Vol:397.000000.
Apr 06 05:39:32 rockchip cgminer[292]: Detected the 0 B1 chain with 72 chips / 2304 cores
Apr 06 05:39:32 rockchip cgminer[292]: Detected the 1 B1 chain with 72 chips / 2304 cores
Apr 06 05:39:32 rockchip cgminer[292]: Detected the 2 B1 chain with 72 chips / 2304 cores
Apr 06 05:39:32 rockchip cgminer[292]: B1 detect finish

seems that chain 3 is dead but something wrong with chain 1? My miner its not new but second hand