Hey Ray, I have the osdiy_22u + extension board and I started having issues on 2 stations due to low voltage (one on main board with ~15V, the other on the extension ~9V). I have been using the board for almost 3 years with no issues, this just started happening a couple of days ago.
All connections look good on the board, but I was thinking of starting with a reflow of the triac solder, based on the threads I’ve read. Any suggestions on what I should check to sort this out?
The SMD triac is BT1308W (or Z0103MN as an equivalent). The resistor next to it is a 2.2 ohm resistor (it’s just a current limiting resistor, you can actually directly short it out to bypass it). The damage is most likely caused due to shorted solenoid or some sort of high transient voltage.