Dear Mr. wndsnb, can you tell me from which country, because I am from Europe, the state of Serbia, I am asking you so that I would know when you reply to our messages so that I can respond to you quickly and not just for a few hours.
I have no problem being next to the computer at any time of the day or night just to finally find a way to fix one hash board, also thanks for the tips so far.

Hello, here I am after a break.

now I have encountered a problem that one capacitor that should pass a voltage of 0.7v does not give me any value. my question is whether to sell to replace with someone else from some other record or to do something else. The hash board is from T17e.

https://imgur.com/Gt9PdtL
https://imgur.com/gEsZ2Cb
https://imgur.com/TD6ZSAb

and I have another problem because when I'm on another hash board from the same machine it performs a voltage check on those capacitors, my test device started the hash board so now I don't know what to do with it because I just turned it off and didn't continue testing because other obligations.

please explain to me a little bit more about where those measuring points are

if you want to help me then you have to show me where everything you say is measured, as in the previous picture

Mr. wndsnb I have to thank you and say you were right for the capacitor

the capacitor in the first example does not give voltage in front of the chip, while the chip in front of it normally sends a voltage of 0.8v and 1.8v

https://imgur.com/zMvEssQ

also on the second hash board we have the same problem but this time it is chip number 1

https://imgur.com/MWKENUE

do you have any solution to this problem

can I use these capacitors from other hash boards, I have a lot of used ones from D3 + L3, what are their labels and how do they change and how is it examined if you replaced them well

In general, I think I have more problems with voltage than with chips, because where my machines are, there are large voltage oscillations and I would be very grateful to everyone for their help.

this is the first time i see it now i thought it was just measured in front of and behind the chip at those five points

nor did I see Zeusbtc explain the voltage domain nicely

I still have a problem with the same hash board. Now, after replacing some chips, I had a problem with another chip, the point is that the values on CKL and other points are not OK even after replacing two correct chips.

I will try to present you my problem through pictures.

How to multimeter parameters

https://imgur.com/SVVyvXK

Start loading the saw

https://i.imgur.com/FSy1BLz.jpg
https://i.imgur.com/fEz9bQU.jpg

start testing

https://i.imgur.com/fEz9bQU.jpg
https://i.imgur.com/gVs19Rc.jpg

Chain 2 find 0 asic and look at the values on the multimeter which should be from 0.7v to 0.9v

https://i.imgur.com/HbjoMMx.jpg
https://i.imgur.com/qDl9k91.jpg
https://i.imgur.com/CkACRRN.jpg
https://i.imgur.com/ayeHcwM.jpg
https://i.imgur.com/rl0iujl.jpg

Measuring only the CLK on the previous chip shows the correct values

https://i.imgur.com/Mluu1mq.jpg
https://i.imgur.com/Qz87PFc.jpg

If you think I'm not doing something right feel free to write to me because I'm a beginner.

Of course, since we are compatriots and we have the same problems, I will share all my knowledge with you here and I can contact you privately.
although I have a lot of problems so far, today I have solder chips with solder paste up to 138 degrees Celsius and got some positive signals for the first time in a month.
I heated the solder to 350 degrees Celsius on a low speed blower
First he gave me an error on chip number 36 which reported a bad RO which I measure the black pin of the multimeter I prick in the RO behind the chip and the red on the chip itself.
As far as I understand so far, the normal values ​​for RO are minus 1.8..v
So after checking all five signals I concluded that the RO signal is not OK on chip number 35, which I replaced but then I was told the same error on chip number 36 which I also replaced today, after measuring on both chips I later the same values ​​of 1 , 8v but now my problem is chip 34 which gives bad values ​​on CLK, CO, RSD by reducing the voltage by half than normal, after that I did not research more than I left the board to cool down until tomorrow.

today I ordered another 50 chips, although I haven't even learned how to install them yet, I'm from Serbia, so sending from here is difficult, both to China and the USA,
I ask about the temperature because these with Zeusbtc advise 450 degrees Celsius when it is removed and when the chip is glued, so I assumed that it might not be much and whether that temperature will damage the chip
and how do I know that I haven't burned the chip from overheating and I don't know if I should put pressure on it during the gluing process,
for soldering I use two solder pastes 138celsius and 183 celsius, which is your opinion which is better

Every day I spend up to 10 hours on the same hash board and new problems are constantly born, problem Chain 36 after a while an error appears chine 21 then chine 6 then Asic 0 and so constantly, a lot of trouble for a beginner, and those from Zeusbtc will not really cooperate,

Every chip I want to glue, I zoom in ten times to see if everything is in place and again I can't set it up nicely, and I'm also interested in whether you test the desoldering plate right while it's warm or it has to cool down really well.

I ordered all the equipment from Zusbtc https://www.zeusbtc.com/.

Can the solder be removed from the chip with a soldering iron, how safe is it for the chip, and is it wise to clean all the solder from the board before installing a new chip?

Well, I'm a beginner in that, today I successfully replaced my first chip, I replaced it after a few attempts, chip No. 01 after that it gave an error on chip 34, I still haven't been able to solve it, can you tell me how to glue a refrigerator for chip and what temperature do you use then and what when should you glue the chip to the hash board.

When it shows Asic 0, I first control the first chip, and then the last. I look at which test point the parameters are not good and after that I start with the control of the chip, first I take off the cooler and check if there are soldering balls then I try to reattach the chip at a temperature of 400 degrees Celsius, if that doesn't help I take off the chip and first try to I put it back again because I clean it nicely, if it doesn't help you either, then I mount a new chip, after that I measure the resistance, if everything is OK, then I go to test and check the values at the checkpoints again.

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Has anyone completed the BItmain course that wants to help a little.

did you manage to fix a board, do you have problems with the Asic 0 error that occurs a lot with me and I can't solve it

I bought a tester from Zeusbtc two months ago, I can tell you that there is still no successful result regarding the repair of my miners, first the tester is of very poor quality, it can be seen that they looked to save on everything, asik 0 on almost all boards and cooperation with them grade 2