My MKR WiFi 1010 worked fine for quite a while, then recently it's failing to initialize a COM port on my Win 11 machine.
The board is powered with 3 leds showing there is power. The ON led is steady, the CHRG led is flashing at about a 5-10 Hz range and the third led, over near the 5V header location is constantly on. I believe the third led should be pulsing at about a 1 Hz rate.
I've also tried a power only cable to see if the last program would start. Same result.
The board did display some inconsistency where it would work sometimes, then not other times. A few days ago it was working fine. Then after being powered down overnight the next day I got the condition I outlined above.
I've tried this on 2 different computers, one Win 11, and the other Linux Ubuntu 24.04. It used to work on both, now neither.
The reset button does nothing at all. Double clicking also does nothing.
Grounding the reset pin next to the dio14 pin also does nothing. The schematic shows the reset button and the dio14 pin are in parallel.
Originally I prototyped my circuit on a plug board, then once I had it all correct, I soldered everything together intending to put it in a project box. The circuit has an AD9850 DDS signal generator, an encoder to set the freq, and an ST7789 display. That's 14 soldered connections that I really don't want to remove unless I'm completely replacing this arduino.
Any idea how I can proceed? Note that the pads on the underside that could be used to connect a debugger are not accessible.