Posting this in the hope that someone can benefit from my experience.
I was playing with key mappings in Vial for my Model F Labs F62. I defined a pair of keys to adjust the haptic feedback dwell time. When I tried them out my solenoid stopped working. I reset the board, re-flashed the firmware (all as per the Model F Labs manual) and loaded the keymap .vil file I'd saved. Still no solenoid.
I fiddled with the firmware flashing for a bit and then it occurred to me that the solenoid might have jammed. I was about to open up the case to check when it occurred to me that a shake my suffice to loosen the solenoid's bolt. So I picked up the pleasingly heavy board and gave it a shake.
The solenoid burst into life immediately.
Other solenoid users might want to try the same technique if they run into a similar issue. Unsurprisingly, I've removed the dwell time controls from my keymap. I won't be touching them again!
Top tip: Model F Labs solenoid fix - shake method
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nihilist000
- Location: UK
- Main keyboard: IBM Model M
- Main mouse: Logi MX Anywhere
- Favorite switch: Beamspring
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dcopellino
- Location: Italia - Napoli
- Main keyboard: IBM 4704 F400 brushed chrome
- Main mouse: Logitech laser wired
- Favorite switch: Buckling spring
- DT Pro Member: 0229
- Contact:
Wow, your keyboard pratically TILTED! 
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dr_xadium
- Location: USA
- Main keyboard: IBM M13
- Main mouse: Elecom HUGE
- Favorite switch: Buckling Spring
LOL my solenoid just stopped as well and I was googling for a fix and realized it might have just gotten stuck, so I rapped the side of the case with my knuckle and it came right back to life!