Geeetech

We are serious seller, we do not escape any problem from our customers', we will do whatever we can do for our customers.

If this is true, please look into this further.

I do not doubt you test your products, I just am pretty sure you are not testing this connector, but instead testing the USB ...

Here is a photo that I took with my phone (I just realized I don't even have a real camera anymore), and you can see the notch facing out. I really wish I would have noticed it before because I am sure it would have only taken 5-10 minutes for me to unsolder and resolder in correctly.

That is exactly what it looks like. The notch on the 4 pin atx molex connector faces out instead of in, just like in your picture but that is backwards. I can take a picture of it if you really need me to but I am not at home right now.

The ATX 4 Pin Molex P4 12V Power Connector on the Sanguinololu board was installed backwards so when power was supplied it blew the capacitors since the current was reversed. I would like a replacement Sanguinololu board since it was your mistake installing it backwards.