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Please Your reparing address, I have 2 , l3+ hasboard

How much for one pieces repair price

I've got intermittent ASICS... Cold boot missing, reboot after a heat up and then off they go again a little later! Dry joints I think, but I've looked at the board once already. Another has all ASICS, no hash. My day tomorrow

Mine had a hole burned into the board when we had a series of power surges. Detected the board but kept on skipping it. Took it apart and then saw what happened. Just filled it up with solder and it was working again for about a week. Same thing. Did it again, now been running for about 2 ish months.

Is it possible to bypass a bad chip and just run with one less ASIC?

Will the Hash Board still hash if one of these Chips have broken off?

PLEASE SHOW RETINNING CHIPS?

Hi friend mine wont stick you know what kind of solder this use, because the temp is right i can make loose the other heatsinks with the same temp but this one wont stick

I tried this on one of my 17+ zero asics and it went from zero to 5 asics however I'm a little confused. I injected at chip 11- 5 asics. chip 6- 5 asics. So where would my issue be? Chips 1-11 or 44 to 11?

How would i send my boards your way? Thanks

I had someone say you had to reflash the eeprom after you replace a chip. true? I have a 0 chip board and a 40 chip board I am thinking of repairing. (Tester is $$$$ !!!!)

Solder Dance at 29:18.

The tester reads total logic chips present and responding to voltage. You still have to identify the chip that is giving an issue. 64 doesnt mean 64. It means 64/total. Rtfm!!

thank you sir very usefull content for miner repaire and maintenance thanks again

But the heatsink, is it only glued?

Great video should i use this technique on the pad or just the chip

what are you charging for this kind of work?

Can you bypass a chip that has slid off and run 29 chips? Is that possible?

When you did the chip replacement here. Did you use a good used chip recycled from another board.. or did you use a fresh chip and have to pre-tin it? Great videos!

When you heat the board from the bottom like this… what keeps the heat sync from the underside from falling off?

What would be a suitable set of chips to replace on a Z9 mini with a dead chip, while the rest can still function?

Why is there a voltage between the heat sinks?

Is better let the board keep blowing with fan while checking,let it cool as possible , we know 17 series mostly has cold solder join , when it heats up problems gone but it appears when it's cold .

много грязи мой чаще

Can i use this method on any miner instead of thermal glue

These videos are excellent. How come you're not making more? I hope all is well

What I do for each board, remove all the heatsink and reflow all chips, it takes lots of time but it will stable. I couldn't find any other option.

Thank you for sharing this video, but this is just temporary repair sir! I don't think these Hashboards will work for more than a month. If you don't reflow all the chips, it will fail again very soon...

You offer repair services?

Hey so in order for me to start up in this i have to buy broken asics and hope i can figure out how to fix them right … thats wat im thinking … i want to start fixing asics but have no broken asics 😂😂😂

Idk man kinda new … really wanna get into asic repair … or just board repair period mobo’s etc … but not sure where to start …

Is it possible to bypass a bad chip and just run with one less ASIC?

T15 asic0 do you have a tutorial?

God bless you for this information I am from Nigeria this is so helpful 👍

Interesting video. Do you have a schematic of this board? That would be helpful in figuring out what you just said.

Thank you. Best demo on simple heat sink install on TH-cam.

i learned a lot! thanks. i have noticed S9 hashboards, some have boost circuit some dont, it baffles me a little, its my perception that maybe the boost is not really needed but very welcomed? shed any light on that?

Thanks. I needed this for my digital forensics homework.

Hi. I would measure the RI/O from chip 65 all the way down to see if the 1.7 V or 1.8 v is there until the last chip (1). And measure the clk (0.8 or 0.9 V) the opposite way as clk moves from chip 1 to the last chip. Based on that you can remove the heatsink and it is likely you find a ball of solder shorting the pads of that chip with the faulty RI or CLk voltage. If there was not anything visible that is making the chain signal(s) be broken I would reflow that chip and cool it and redo the signal test before replacing it. If that did not work I would measure the test points in diode mode just to triple check and if the values were not as they must be then I would replace the chip. I have done it and it has helped me save boards and reduce headches :). Sometimes I remove the heatsink I find that some boards are missing resistors or capacitors (the ones surronding the faulty chip), of course I compare it to a good board from which I removed all heatsinks.

Hi, you make great videos. Could you please advise me. When checking and measuring hashboard S17+, chip 5 gives me 0.8 v, but chip 6 already receives 1.8 v measured CLK per chip, I can't figure out the error, how is this possible. Can you please advise me where the error could be? I replaced chip 6 with a brand new one, but I still have the same problem and I don't know what to do. That's why I'm asking for help. Thank you, if you answer me and give me advice, I will be very happy and very grateful.

What temp do you usually set your heat gun too?

Hi Sir, you bring us a great video, thank you very much, but one question for you, at 13 minute 50 seconds of your video, you begin to measure the 1.8V and 0.8V, I noted you put one prob on the heatsink(chip side), Does the heatsink equal to domain GND? I have measured my S17+ hash board, the heatsink(chip top) is not domain GND and neither 1.8V or 0.8? What voltage is on the heatsink(chip top)? thank you very much.

Do you do board repairs for others?

Your videos are amazing!! do you put the solder on the back of the heat sink and on the chip first and then heat it up? what solder do you use? what about thermal paste?

thanks for beginner tutorials very helpful!

Good job mate.

Good job mate.

I will learn this and start working on repairing this machine. because there are many engine models that I will study and repair, maybe S19, T19, and T17 too. - does every hasboard have such a black dot path? - does the high temperature still have to replace the chip? - is it enough to stick the chip with the flux? or the new chip already has a tin ball installed? - what temperature blower did you use to remove and install the heatsink and chip? - how long do you cool a board that has already been heated? - you counted heatsink 1 from bottom left, does that count apply to other board models? - if one of the ICs burns, will the path be damaged or not? otherwise I just need to replace the burned IC that's all right? sorry if I ask a lot of questions, because I never learned this kind of repair at first, even using a multitester I don't understand.

I'm not sure that your description of how the 1.8V and 0.8V voltage domains is correct. According to schematics and a number of boards I've seen (taking the S17+ as an example), the 1.8V core domain voltage (and thus the 0.8V domain) is regulated down by the domain LDO straight from the 21V main supply voltage for all but the last three domains. The last three domains derive their 1.8V supply from the 24V boost regulator output. What you stated here is that the LDOs derive their input voltage from two domains prior to where they are, and I'm yet to see a board with that configuration - in fact, if you do have collateral showing this for models you've worked on, then It'd be really good to share that. As an aside, the domain voltages and power distribution of these boards are amongst the worst I've ever seen in high performance computing and FPGA designs in general, in over 25 years being a researcher and an engineer.

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