What can go wrong with the core?

Testing/Troubleshooting
1

I have measured the voltages on the core and they are all correct. I can program the PIC via the JDM on the core but when I run the test programs nothing happens.

The test_tx program doesn’t work but when the JDM is connected instead of the jumpers, the LED lights up on almost any pin of the PIC.

The LCD doesn’t do anything, no signs at all and no backlight.

Where shall I start to look? Are all the important components allright if I get the correct voltages?

2

As far as I know, the backlight should come up even without a stuffed PIC!

Check the wiring to the LCD (also the backlight pot)!

Try burning the MB64 program. If you then switch it on, the LEDs of the DOUTs should play some pattern and the MIDI out LED should shortly come up, to.

At least you can be sure then, that everything except the LCD is fine.