SOLVED . The korg has a old obsolete smart card interface on the top front panel that i disconnected so i could use the opening to mount the Oled screen. Reconnected the interface and all good.
I fitted a Gotex unit with Hxc firmware and Led 3 segment screen to a Old Korg i3 synth all was working well
But i decided to fit a Oled screen to enable to read the files. The unit works as before but during and after the file has been uploaded to the Korg the screen and Gotek freeze?
The korg has received the file and can play the song and is fully working
But i have to power down the Korg unit to enable to unfreeze the screen to navigate to another file
can anyone help?