Ok, LCD problem solved. E pin was partly disconnected in some way. On LCD interconnection test, after going out from E line test, LCD goes blank. After fixing second SID audio channel, I was going to check how this one sounds. Checked testtone - clear. If done SID interconnection test, i've lower volatages on A3 and A4 (3,5V, but I've uncalibrated multimeter...) , +5 at rest. Unfortunately when I'm trying to start MIDIboxSID app, it restarts on "Launching CS". Thanks for help ;) EDIT: Same without SIDs board. DSCN4166.JPG