I was messing around with a 7/8th blade and adapter in my lightsaber built for 1 inch blades and the pins must’ve misaligned which caused a burning smell to come from my proffieboard. Surprisingly, everything is seemingly fine except one issue: the killswitch no longer cuts power completely. When the blade is ignited, when I turn off the killswitch, the neopixel connector stays dimly lit until I turn the killswitch on and off again. The board also seems to draw power from the battery even with the killswitch off. The lightsaber uses a fixed chassis and I didn’t install it myself so some parts are hidden. I’m wondering if other parts need replacing or will replacing the board fix this issue.
You most likely fried the MOSFETs connected to your led pads.
Can you tell me which led pads the npxl connector is soldered to?
Does the Proffieboard get hot? I did the same mistake misaligning pins. Things seemed OK for a minute until they weren’t, basically my board was fried and had to replace it.
Did your board get hot when it happened?
The npxl connector is soldered to led2&3. The board wasn’t particularly hot but there was definitely a burning smell.
Afterwards, the lightsaber does light up a blade fine and has good sound, it’s just this issue with the killswitch.
The same thing happened when I was putting together my second saber and it was the MOSFETs connected to led2 and led3.
If you can, you have to swap to other MOSFETs by using led4 and led5 pads, that will fix the issues you are having with power loss and any blade issues you may have experienced.
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https://fredrik.hubbe.net/lightsaber/v6/partmap.html#q1
You can see them here as Q1-6
Edit: This is a part map for the V3.9 but the layout of FETs is the same.
If it’s not a big deal, it can’t hurt to replace the board. You can try switching the negatives to the pads 4/5, just remember to change it in your blade array in your config file and reprogram.
I wonder if there’s and extra component in your kill switch, or is it a high amp basic switch? If it’s a smaller low amp switch there’s usually an extra component to help handle the current that may be damaged.
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Forgot to mention that part, Thank You 
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Alright thanks everyone for the sanity check. I wanted to make sure if the symptoms pointed to any other problematic parts but I’ll definitely work on switching led pads or switching to a new board.
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