Thanks for the response. I have gone through most of the other tests and things seem to be working correctly except for monitoring extruder temperature. I’ve swapped the pins in the firmware for the therm1 and the bed for now so I can continue testing that everything else is working. Pumped to see this squirt out some melted plastic for the first time!
I’ve had a look with a magnifying glass (albeit a poor one) and I don’t see anything particularly wrong. I followed a suggestion to someone else about checking resistance between the first pin on the thermistor port and the 5v pin for the expansion board. From therm2 which is working correctly I’m seeing 4.7kOhms which was correct according to the post, but Therm1 was showing 1.7kOhms. I’m no electronics engineer (and this is my first electronics project as well), but wouldn’t this mean either a resistor is not functioning properly or trace allowing a partial bypass of the resistor?
There is a fishy looking solder job on the 4701 resistor below the therm1 connection. I’ll try to get a high-res image posted tonight for possible comment if it could be related. I just this last month so I’m hesitant to start re-soldering it myself.
Cheers,
Steve