So I've now had my first node board (nodefailure on my Aerosmith. 520-7017-72 node board. I have the the 48V LED on the board but not the 6V and the board does not boot. Removed all connectors but the bus cable and power (CN6) and result is the same. I've been poking around here and it seems a reasonably common failure mode but I haven't seen much troubleshooting guidance.

Looks like Stern has now replaced this with the 520-1057-40 board. Should I just go with the new board? Am reluctant to swap without understanding the problem. And I'm used to doing my own board repairs (at least on classic pre-spike stuff).

Any thoughts on specific troubleshoot steps for the 6V on the board? Or is anyone here repairing them? And am I going to need to invest in a hot air station to work on these boards? Just feeling a bit lost at the moment.

Randy

To get Aerosmith back up and running while I try to repair the old node board (D9 was definitely shorted but replacing it alone did not resolve), I went ahead and purchased a new node board. I got the newer 520-1057-00 (Green) node board as replacement for the old 520-7017-72 (blue) board.

Supposed to be plug compatible but I I was surprised to find that the CN6 header is not keyed...all 5 pins are in place. Pin 2 is supposed to be the key pin. Maybe just overlooked in the manufacturing process? I can just cut the pin off of course, but was curious if anyone else had seen this? Just seemed odd to me.

Randy