derspan1er

Hi Everyone, after years of lurking, i have been struck with..."semi tragedy". I have an Ultimaker 3 Extended ( firmware at this point was 5.2 something i think ), and that lovely machine has worked almost perfectly for all those years. With almost i mean: a year or so ago, i noticed that i could not switch to cabled connection, no light would show on the RJ45 connector, and when i tried to run the Wifi wizard, the screen would go blank for 2-3 seconds and the main menu would show. Did not bother me all that much, because i could send print jobs wirelessly via cura with no problems. Last weekend, i decided to make a thorough maintenance run, realign axles, tighten belt, calibrate everything, and decided to do a factory reset clean that too. Well after the factory reset, the Printer would not boot into the menu. It turns on, lights beep, but the LED strips would not turn on and the menu not boot. Shocked, i started looking into the forums, and embarked into a 16 hours odyssey of "trying everything". Long Story short ( or: this is where i am now ) : - Wifi Board removed - NFC Cable removed - Tried docents of firmware recoveries (uSD), AFAIK the only one who breathed life back into the machine is 3.7.7. - Every attempt to update from there "kills" the machine again - Olimex cable is ordered, waiting on it. - Still can´t get connection via Wired connection. i assume i will have to go through the procedure given by the moderator gr5 ? Maybe someone has some hint or help to make me understand what could be broken ? Thanks for any help Chris