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Since I posted this a short while back, I feel it is only fair to post an update since the response from Bitmain has been reasonably impressive.

After a few days of initial troubleshooting (back and forth communication with Bitmain where they asked me to try various things to fix the problem), they asked me to send the units to their repair centre in Europe. I know from following the tracking number that the faulty units arrived at the repair centre on Wednesday 3rd June. On Thursday 4th June I received a notification from Fedex of 2 brand new replacement units being shipped from China, which duly arrived here on Tuesday 9th June. They would have been here Monday 8th if it wasn't for a delay in customs.

The replacement units are working perfectly. Whilst it's not good that I received two faulty units initially, in their credit they have replaced them very quickly and with no complications.

How was that a pretty good service?  , did they refund the shipping fees he paid to send those faulty hash boards to Europe? did they compensate him for the days of mining he lost? ya "pretty good" is a bit of a broad word, but for Bitmain to do it, I guess it's outstanding because we are not used to that kind of "okay service".

With that being said, and despite that not being the best thing one would expect after paying a fortune for mining gear, I consider danieleither to be a lucky client who got VIP treatment, your chances of receiving the same thing are not so high.

danieleither, glad you got your gears to run with all three boards, wish you luck with them.

Is that $1500/ each or all 7 together?

Mikeywith, what really disturbed me is the part the guy says, "Because new miners rarely have such problems in China, it is likely that they have been injured during transportation"

So how do they transport the miners within Mainland China? By teletransportation as in Star Trek? Scotty beam up the miners to Shinchong farm? Nahhh they ship them the same way the do to other parts of the world.

So thinking about the way that people operates, cheating and lying all the time, I have come into a conclusion that Bitmain have two assembly lines, one for their own farms and customers within China, the other for the rest of the world which is low quality and compensates the extra costs invested into the "domestic production assembly line".

Moreover, they don't want more competition so they take your hard earned money, send you a crappy machine and in 3 months max you are out of the business either because you ran out of money or you are not willing to spend more in some other brand of equipment and in the top of that you have no working miners either.

I paid

 Antminer S19 Pro 110TH   - 3400$
 Antminer S17/S17+   - 1100$
 WhatsMiner M20S  -1400$

i want 

 Antminer S19 Pro 110TH   - 3000$
 Antminer S17/S17+   - 950$
 WhatsMiner M20S  -1250$

Let me know.

few questions

are you willing to take all stock ?
your location ?
do you have a friend in NJ or NYC ?
what if shipment gets delayed due to virus mess ?
how much you willing to pay ?

Ljudi, ja ne znam o cemu se ovde prica, 5at0ss1 nam je pokazao kako da decentralizovano trgujemo BTC, bez ikakvih provizija! I to anonimno i bez poverenja u drugu stranu, sve kriptografski zasticeno. Hajde lepo dodjite u grupu https://t.me/btc_bez_provizije ili cak ovde ostavite ponudu, da li kupujete ili prodajete i koliko, pa da trgujemo tako da bi i Satoshi bio ponosan na nas!

Da li mislite da je ok idea transverovati sa binanca na cex jednom kad hoces da povuces neki iznos?

I understand what you are talking about, you are referring to the chips that are on the other side of the hashing boards, the small ones with small heatsink. However, what I am doing is putting upwards the chips with the long heatsink which are the ones that creates most of the heat and thus are prone to fall off the board due to this high temperature. The ones on the opposite side have a small heatsink which tells me they develop less heat. I am testing this position on several miners and see what happens.

About your question of keep it stock or overclocking, I rather underclocking them cut the blue wire from the fans and place the miner in a horizontal position instead of vertical so the chips on the boards also stay in horizontal position and that might help to keep them from falling easily.

Friend Favebook, I already did and I'm really sick of  "copy and paste" answers by someone called Jessica L. who is in charge of technical department.

I always make money with ASICs.  I mine with them for a few months then sell them, never sold one for less then I bought it for.  After 5-6 months of mining I sold my Z11s I bought for 2k for 2.5k.  I bought a K5 mined for 3 weeks and sold it for $200 above what I paid for it. ZECs reward is having in the next couple months that is something to take into consideration.  

z11s are over a year old and still profitable, that is great for an ASIC.

I have some background in electronics and analyzing those intermittent failures that these miners have just got me a little confused, specially during a time that I checked control boards and data cables by disconnecting back and forth.
At times the miner was full throttle mining just to drop after few hours. That in electronics is called a "cold soldering". Although there are not visible cold solderings I discovered that the soldering material that is being used on this S17 have 2 problems.

First, high amount of lead and low proportion of tin, and of course zero silver in the soldering material. This can be observed under the microscope used to soldering circuit boards. All of the solderings showed a greyish mate color and no shinning finish.
 
Second, below normal temperature of the soldering material, also leaves traces, specially on the hashing board chips. Also analyzed under the microscope there are traces that look like an sponge along with tiny cracks surrounding the chip's area at the surface of the hashing board.