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Hello.

I have received 10 EVO Boards from Pcbway (V1.4).

I have tried to connect each of them with the computer but it is impossible: Windows detects absolutely nothing!!!

I have tried on 3 computers and with several Mini USB cables and there is no way.

USB 3.0 Hub between my PC and the pin2dmd... and nothing...

However, another old V1.4 board is detected by the computer at first.

I've read all the posts with this problem but I can't find the solution.

I need help please...🤥

Edited by Chesco
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11 hours ago, Chesco said:

Thank you very much for your reply Lucky.
I understand that I have to program the Boards in ST-Link mode.

Do I need an ST-Link interface, right?

Yes ! Either that shown on your picture or if you have a Nucleo or Discovery board at hand you can use the onboard ST-Link as well.

The EVO does NOT have a onboard ST-Link interface.

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8 hours ago, lucky1 said:

Yes ! Either that shown on your picture or if you have a Nucleo or Discovery board at hand you can use the onboard ST-Link as well.

The EVO does NOT have a onboard ST-Link interface.

Thanks you very much again... 

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Try with all boards you have just in case you have another hardware problem with the board you are testing with, but

I think you received fake chips.

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Thanks you very much for your help and your time Lucky 😉

 

5 panels programmed with ST-Link and none of them work...

 

I will open a DISPUTE to Pcbway😡😡😡

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1 hour ago, lucky1 said:

Just to be sure, check the voltages at the CPU

How can I do it? 

Some pictures with pins and voltage? 

Another thing... USB Driver select and file for program is the correct?

I has program with 12V input and whithout  12V input and... NO WORKS...

Greetings. 

20220123_191806.jpg

20220123_191809.jpg

Edited by Chesco
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Good morning.
I have opened a dispute to Pcbway and, after sending the evidences (images and video) they have assumed that the installed STM32 Chips are Fake. (@lucky1 was right...)

They have offered me 2 solutions:

1.- Recover my money (with this option I would lose the 250€ that I have paid in taxes in my country).

2.- Go back the Boards to China so that they can put valid STM32 Chips.

My question is: can it be problematic or give future errors to remove a Chip from a Board and solder another again? I mean problems due to solder residue, bad connections...
Thanks you.

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5 hours ago, Chesco said:

My question is: can it be problematic or give future errors to remove a Chip from a Board and solder another again? I mean problems due to solder residue, bad connections...

 

If you have the right equipment and skills that is no problem. I would take option one and find someone who can change the CPUs.

The hard job currently is to find good ones. Maybe @Tinkertilter can help

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4 hours ago, Chesco said:

The latest Chips are programmed in a specific way?

 

No ! If you can´t program them in DFU they are most likely fake .

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