byoc wrote:
This is very odd behavior. Usually, an intermittent issue like this suggests that you have a cold solder joint somewhere that sometimes makes good contact and then no contact. However, if there is some consistency to your problem, e.g., it cuts out at exactly 5 minutes every single time, without you touching and moving anything, then I'd be more likely to think it was a problem with a component. First try reflowing your solder joints on the PCB and foot switch where the LED is concerned. If that doesn't fix it, check to see if the 4k7 limiting resistor is getting hot. You may need to replace the LED, 4k7 limiting resistor, or the footswtich.
I reflowed that 4K7 limiting resistor and the other joints you suggested and it's working! The LED is staying on! Thanks for the tip. I'll likely go back and double check other solders to make sure they look good too.
I really appreciate you taking the time to look it over and think it out! Thanks!