LAN/NIC problem

[androsch]

And I truly appreciate your effort, Mark.  And I'll help anyway I can.  Sorry I let my frustration with Pine64 Support get in the way.  I would think it would be as obvious to them as to us, that this is a hardware issue.

What can I do?  I don't feel confident in being able to reflow the chip.  I'm handy with a soldering iron, but those pins are just too small for my eyes.  And I don't have a heat gun.

You will not really try to resolder a bad soldered chip on that board by yourself? Do you also rebuild the engine of a car you bought, even when its a really cheap one from a nice guy?

Let MHH do its test with resoldering, but i would really not see this as a possible solution or suggestion for anyone else. Its just a check from him, whether the soldering is part of the problem, but i personally would not even think about resoldering anything on the board. Eighter they accept this as the reason (if it really is) and the Pine64 guys have to redo the soldering at the producing company resp. they send me a new and good soldered board, or i will use it with 100mbps only and feeling a bit frustrated by this 'maybe' good piece of hardware....

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Agree to collect data about the issue, but also please allow data to be collected in a sensefull context and also in every possible direction. To nail the problem down to a hardware issue BEFORE really proofing it, is also not helpful!

oh... androsch, there is absolutely no question about this being a hardware issue... no question at all. 

... there is a difference between 'knowing' its hardware (and I KNOW its hardware) and having the 'data' to backup the root 'cause' of the hardware issue.  There is absolutely no question at this point that this is a hardware problem... it is, period.   But,  is the root cause components, soldering (cold joints), soldering open connections bridges cap issues, or missing components?   I am absolutely sure this issue is hardware, but I still don't know what the 'root' cause is.  But I am sure it is not environment, and I am sure it is not software.

So please explain why my board run perfectly at longsleeps environment. It was the same piece of hardware and exactly the same as i used, because it even was my board! So it has not only something to do with the board itself but with anything related to it in the environment. Maybe its a switch in the software or a certain part of negotiating process or anything else. To find out what it is, needs to be open to all directions of failure and not limiting it to some directions you think it may be....