With my TV all works perfect but not with HDMI-DVI-Cable on my Computer-Monitor. My Monitor is a Samsung Syncmaster 2253 BW. After power on mini my monitor says "Ungeeigneter Modus - Empfohlener Modus 1680x1050 60 Hz"
Google says "Inappropriate mode - Recommended mode 1680x1050 60Hz"
What can i do to use the mini with a monitor and not with TV?
Your monitor has a native resolution of 1680x1050 and the C64 Mini cannot output at that. The HDMI connection is trying to push it through at that resolution and it's just not going to happen.
Might be time to upgrade that old monitor.
Thanks, for answer... i think over it ;-)