Seem to be intact is not the same as proven to be. If in doubt, resolder. I suspect your spray is chilling the board for a moment and affecting this.
Your LED might be perfectly soldered, but that doesn't mean the LED itself is not defective. It is a dual LED. When you see a green it means red is not working. There is no green indication, green is only there to combine with red to make yellow. SO for gain you see both LEDs on to make yellow. TO go to red for More Drive, they turn the green off, leaving red. If you get green showing up, that means red is not working. And that is enough to cause channel switching problems. I mentioned before the current to operate the relay goes THROUGH the LED. And if the LED doesn't work, then neither does the relay.
Your LED might be perfectly soldered, but that doesn't mean the LED itself is not defective. It is a dual LED. When you see a green it means red is not working. There is no green indication, green is only there to combine with red to make yellow. SO for gain you see both LEDs on to make yellow. TO go to red for More Drive, they turn the green off, leaving red. If you get green showing up, that means red is not working. And that is enough to cause channel switching problems. I mentioned before the current to operate the relay goes THROUGH the LED. And if the LED doesn't work, then neither does the relay.
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