I recieved the W5500 today and soldered in his Place.
It was a bit tricky but the Board and the Network are alive.

@dc42

Thanks for the link to the shop.I ordered one an will look if i can solder it.

A big Thank you to the Support from the Manufacturer and the Users of this Forum.
It is magnificent.

Great. I will try it. I have nothing to lose.
Now i must find a shop where i can buy the Chip for a private person.

@frank26080115
thank you for your Idea. I removed the chip with a
scalpel and the Board is back on Track.

Will the Board can used normaly when i replace the W5500?

Thank you for help, but i think this it not possible for me.

Today i tried it again.
Only Power from USB.
Sd Card removed.

I found that U10 is getting very hot.

The regulator has no "R" in the part number.
I have removed the Sd Card an its still no power on 3.3V
i had an Piezo orion to the Board connected when i damaged it and the Orion is broken.
had to Power the Board half an hour but could not identify a chip that is very hot.
It seem to me that i have not enough skill to repair the Board. thats to bad.

Hello,

i own a Duet Maestro, on building my printer i shortend the GND from "always on" Fan J24 with - from PWM Fan0 J25.
Now i knew it was a terrible idea.
The 3,3Volts LEd was off.
I replaced the U2 low drop reg, because i measured on the Out only 0.6 volts
but after replacing this part the 3.3 Volt rail is still dead.
can someone give me tipps to repair my Board?

Greetings
Harald