(I had to choose a topic from pre-ordained list it seems, closest I could find was "fuses")
When I turn it on via toggle to inverter setting, it flashes yellow, but that is all it does. No current shows up at output. It is attached to a battery bank of 24V x 305 Ah of LiFePO4 showing 25.3 volts.
1) I've studied and reset the dip switches, I do not think that is the issue
2) I've checked the one small visible fuse in the upper right corner
3) I've bought the Mk3-USB and successfully upgraded the firmware from V498 to the current 510.
4) I tried to feed it 110 V AC to see if that would "wake it up", this did not work.
I do have an RMA to send it in, but its almost assuredly out of warrantee, and I did not buy it myself new, so I have no receipt. Shipping isn't cheap, and there is the time element as well.
I'm very comfortable unsoldering and soldering in components, I have an excellent desolder tool with vacuum etc, and good equipment to resolder as well. Warrantee is up, so its worth doing simple things in my opinion.
Are there any other fuses I can check on my own, even if it requires some disassembly to get to the boards? It seems nearly inconceivable that such an excellent product isn't easily fixed. Not sure what else to try at this point.