No, not by adding OLED, it was something else. Dont really know what happened to the board. I have one more now that has got the "low output issue". I am thinking this one can be fixed by adding a resistor or something, I read about that somewhere. But again, I rally dont like to tinker with these things cause its so easy to break, if you dont know what you are doing. And I really don't, when it comes to the hardware side.
I have very very little experience with building hardware stuff. I did build one of the Modular thing Axo control boards, which worked great........... for while. But after a while I started to get a lots of humming from the main output on Axoloti, so I had to take the Modular thing board off again and then the humming stopped.
So back to square one.
For the OLEDS I havent even tried. I got 5 of them, but I just cant get myself to do. If there was a video of someone who did the whole thing I would feel comfortable trying, but al the info is in bits and pieces, so havent really tried.