First entry:
I got my motherboard on Thursday, 30.06. and directly put my Micron DDR4 Kit in it, added my 60 Watt charger (because the original Framework Laptop also got one, so I bought this) and powered on the device. Well, that did not work. I only got blinking error codes. I looked through the net and found some explanation that told me the power was ok, RAM also, but the CPU had not started - and the FAN was not spinning - which was what I could observe. I tried further, landed on this forum and opened a topic the same night: Framework Motherboard does not power on / blink code
Luckily, @Azure and @Xavier_Jiang were so friendly to inform me, that my power supply was insufficient. Trying to use the motherboard without a battery would need a 100 Watt power supply, with battery only a 60 Watt. While I found that a bit concerning, I found enough evidence in the forum that I though I might give it a try. I bought a Spigen 120W GaN Fast 4-Port Charger and an Spigen DuraSync USB C 100W 1m cable - to be sure that would work. The supplies arrived on Saturday, 02.07. - and it did not change the situation.
I got in touch with the Framework Support Mail and those nice guys talked me through everything: Reseting the RTC Clock, getting a Video of my Postcode, “Hot Swapping RAM” in hopes to get it working. In the end they remarked that my memory (while being one kit of Micron and one of Samsung RAM) was not on their compability list and might not work / could be the issue. I was a bit reluctaned to go on there: The POST code said voltage was ok, RAM was ok. The CPU was not booting at all - I had removed all other devices (like NVMe) to be sure nothing could hinder the device - it was just power via the 120 Watt brick, a short 1m/100 Watt rated cable and the memory modules. I also let the RTC battery charge since saturday, but no joy.
In the end I bit the bullet, tried to get in touch with @Bee (who is leading the Creators program) - remarking that I might have a “dead on arrival” motherboard - but did not an answer yet. I did buy one stick of Kingston KVR32S22S8/16 RAM the same night - which arrived today. Sadly - as I feared - the board is still dead.
Now 17 mails in with the support I hope they send me a replacement board, because there is nothing more on it that I could change on it.
(Thanks at all the nice people supporting me so far 
)