sanemalkavian

Thank you for that. A bit of cable rework did the trick. It is all working now. :)

Now I have to fix OLEDs. They worked partially after I installed hardware config file (left screen was showing some parts, but not all, and right screen was showing only first few columns). After I installed latest project.hex midibox firmware Only first screen is working partially, the second one is not working and I am getting strange info on the first one. Lots of strange symbols and skipped places. The second screen is not working and when I try to play the sequence the led matrix displays FAULT. How to start debugging this?

I reworked the cables and checked pin by pin, all working. Top 4 rows are not lighting up, so as you said I will reflow IC17 and IC18. Here are the pics of how I soldered them. Thank you for the fast reply. EDIT: I reflowed all both ICs and now everything works perfectly. Thank you.

Hi everyone. I am working on the project and got to the point where I need to test the LED matrix. I have the bottom half of the matrix working, but the top part doesn't react at all. I slide CC16 and half way there it will light up bottom half of the led matrix, but after that nothing happens. I checked and reworked the cable, but I am not sure how to test all other parts. Could you please help or point out to schemtic? Thank you