Topic: Antminer R4 - Wrong chip index (Read 3611 times)

I'm resurrecting an old thread here. I'm curious if anyone with some pcb assembly experience has tried diagnosing this issue. I'm willing to test every inductor, capacitor, resistor, and chip lead with a multimeter—but how do I get this epoxy off cleanly? Is there anyone with feedback? Thanks.

Where exactly is the U.S. location for repairs?
Thanks

I just got the e-mail stating the U.S. location for repairs, it's on 1/2 hour from me.  Wonder if I can take my R4 there myself and get the 2nd board fixed that went out soon after I got it?

Thanks for the info VRobb!

Yeah, seems like they now do warranty repairs in both Hong Kong and US.
And Bitmainwarranty is still there for out of the warranty repairs.

Bitmain just announced a repair facility in Commerce, California.

My R4 was humming right along since Dec 16,2016, had already paid for itself & made 1k profit... Then on July 12, 2017 over the course of 24 hours, hash rate dropped from 8.1 to 4.1, so I made the mistake of trying to cold reboot the R4 - now NOTHING. The fan spins at a very low speed and nothing else happens.
Is there ANYWHERE in the USA that will repair these units?
Thanks all.

Make-A-Buck

I totally agree with you!
Ordered 20 of them, and 10 R4 stoped working after 24h to 48h, and some from the beginning!
By the time I send them back for fixing (the entire miner) and get it back, i lose 2 to 3 months of mining and difficulty
I believe they should cancel this model!

damn!
I'm really surprised at how many broken chips are in brand new bitmain products!!!!

 

They have no quality controls on their brand new products!!!
This is really unacceptable!!!

Thanks for the clarification - good to know.

Not correct. The problem is that they no longer seem to give out coupons EXCEPT in cases like yours. They used to give out coupons to buyers very frequently but methinks s7's are the last miners they did that with.

If you get one then as long it has not expired -- go for it.

My 2 R4's are now on their way back to China - hopefully they return and work without fault, though I have my doubts.

Bitmain did offer to pay the return shipping however UPS will not accept receiver pays without Bitmain pre-printing the return shipping label, which they wouldn't. Bitmain suggested they'd provide a coupon to the value of the freight but I've read that they do not allow coupons to be used to purchase miners.

Has anyone had any luck trying to fix it?  I see a couple weird posts that dont make any sense but its frustrating as hell.  I see the pic is actually verifying the hash board SN with the controller now tho.

boomin

yeah my 50 day old unit has  1  board like the op's.   I purchased it on Dec 08  I have tired a few ideas none work.

My 11 day old has good boards and fan is terrible nasty sound..


 I am going to try to get someone to authorize a fan swap on my end  so that I only send in 1 machine.

The I/O signals (typically 3.3v) between controller and hash boards is fed from the controller board via the data cable. At least on s7's and I have to assume also with the S9's and R4's that cable also feeds the PIC. The 12V only feeds the ASIC cores.

Most strange thing is that if you will disconnect power supply cables from the non-working board and keep data cable connected "Wrong chip index" error still trying to find working asic on that board and shows 0 asic. In the end just block miner hash possibility.

How it can be possible?
How controll board receive info from non powered board?
Or maybe Hash board was not power plugged at all after mulfunction?

It's quite probable that I have the mh/s incorrect. It's been a while since I fired them up. They were USB miners.

kinda funny though, they made me almost as much money as my r4 does today at quite a bit less cost.

As for Bitmain Warranty. I just assumed they were affiliated, since they were using the same font/logo as Bitmain albeit a different color ant.

Far as I know, Bitmain Warranty is not Bitmain at all but a separate entity that got good at fixing Bitmain's stuff on their own and decided to make a business of it.

Additionally, Bitmain never sold a 335MH stick miner.

How about not even 4 hours. Well, I had good luck with Bitmain's stuff. I've been buying their products since the 335mh stick miners. So when I got the first R4 and it worked well, I figured I'd gamble on a second.

Bitmain Warranty is and isn't Bitmain. I personally think they should be honoring Bitmain's 180 day warranty, especially if they are gonna call themselves Bitmain Warranty. The fact that I even have to pay anything to ship it back to them irks me, but I knew their terms when I gambled on it.

Paying for shipping to Colorado vs Hong Kong plus the shorter downtime, might be worth it if the repair cost was cheap enough.

Charging for a repair?  That's ridiculous!  ITS under warranty.  The real problem is with trying to run the unit with only one board is the airflow.  The air takes the path of least resistance and will bypass the heatsinks if you try to take out the other board.  Mine originally worked with both hash boards, but I noticed that it was only hashing on one board.  So the natural thing to do is restart it....DONT!  Then you have to troubleshoot the bad board and disconnect it from the hash plug to make just the one board work.  They should advanced exchange a mining board on something less than 30 days old.  I don't mind paying for the board and waiting for a credit, but to buy something "brand new" and have it not make it 48 hrs is ridiculous.  In any other industry the company would be run in to the ground and no one would support them EVER AGAIN!  Now we know why United States has laws governing too much control of an industry.  Makes me sick I have to work on anything I just paid money for.  Can you imagine buying a new Ferrari and the tire falls off and they say oh we are sorry, please send back your $ 300k car for a month while the value of your new car is going way down so we can do what we should have done in the first place!?

I am not happy. 

Bitmain needs to address this issue!  I will pay the .25 btc for a hash board to be sent NOW and then when you get my defective one I ALREADY PAID FOR back then return my .25 BTC deposit.  The difficulty is going thru the roof since they just disconnected all these machines and hooked up their "new in 2 months" to us machines when we pay for those machines. 

Does anybody else think this sounds unreasonable?  any other company would advanced exchange the entire unit for a new one *but I understand BTC is a different game.  They would need a deposit....

Please chime in...

Boomin