Hi,
bogard posted this:

Today, it's a good day   - I'm back in action.
What I did:

Thanks to the information by Soros Shorts and wolke, I checked the PSU-cables.
There are many differences regarding the connector-settings of ANTEC and the LEPA.
So the failure was to use the ANTEC cable-management cables with the LEPA- so i shot through the PS-ON Pin to much Power.
What happened:
1. The Raspberry PI died an heroic death, because it got more than 5V and plenty more current.
2. Like on the picture of the last post, some parts and connections of the PCB died.
So I tested again and figured out, that the connection between the socket of the PS-ON-pin was broken.
I solved this with an quick and dirty modification:

After some more tries, I figured out that the PS did not start. So the PS-ON circuit was probably damaged.
I fixed this with an paperclip between GND and PS-ON as bypass.
The new spare Raspberry PI started again!!! (Was glad to own one!!)

After installing and connecting all together and do a test-run I was very very very lucky:
Mining again, all units working  

BUT I really think that the overheat-shutdown doesn't work regarding to the damages (I don't really care).

Thanks for your help, maybe this helps some one who made the same (facepalm) mistake like I did.

Many thanks wolke and Soros Shorts!
Now i have to life with this disgrace...
Will check all components, with luck only the board is damaged...
Bad day 

Hello, thank you for this nice information base.
Two weeks ago I owned a pre-owned CoinCraft with 5 modules and an ANTEC 1000W PSU.
I decided to upgrade the PSU to an LEPA 1600W.
After connecting it and switching it on, the PSU knocked two times. I unpluged all connections except the mainboard connector and switched it on again...
I saw smoke and realized, that the connectoin on the PBC-Board from PIN 24 to C18 to C16 burned!
Since that its not possible to start the unit, neither with the original ANTEC PSU.
.
Now I will try to fix the PBC board, but I don't know the function of the capacitor and the resistor.
So please help me with this questions:
Could this be an issue with the PSU-ON-Pin? Is there a difference between the ANTEC and the LEAP PSU?
Is it possible to buy a new PBC from anywhere if I can't fix it?
What did I made wrong?

Many thanks for your help!