JD-990 not sending or receiving SYSEX

I have a new to me JD-990 that does not receive MIDI patches over SYSEX and the bulk dump does not send anything either. Playing with a MIDI keyboard works fine and everything else I have tested works. It seems to be just the SYSEX send and receive is not working. I have everything set to ID 17 with RxMIDI set to -2. I did a factory reset and moved write protect to OFF.
From my inital look at the service notes it looks like the MIDI ports go directly to the processor, so I dont think there are any components in the way to go bad.

What am I missing?