Ok, I m working with a NG AtMega8. Usually I use USB Power and evry thing works fine. This is the first time to run the board via EXT Power. I switched the jumper and so on....I plug it and RX TX started to flicker instantly. I knew,that this was not normal. So, I my board broken, messed up or what.? Itd be so rad if someone could help me out.
A one thousand Thank You for spending some timne on reading this.
Ok, here we go. I checked it yesterday, but it didnt work. Afterwards I noticed, that this failure(not restitor thing) messed up my bootloader.
fortunately, I had a second one in my shelf.
AnyhowI had to look for a other solution, cause dead line was calling - the key to my happiness was buying an USB Supply !!! :-/ Whatever, this might not be the best solution, but, hey, it works.