Hello,
I have a Lifespan TR1200DT treadmill. I started getting a DC-1 error code, and Lifespan informed me that there is an issue with the Lower Motor Control Board.
The board is similar to this one, but replacements are no longer available as it's an older unit:
https://fitnesspartsrepair.com/products/lifespan-tr800-tr1200-treadmill-motor-control-board-lower-controller-lpca-desk?variant=15835445100601
Here is my board (needs a good dusting!):

Does anyone know of a resource for repairing or replacing the control board? I've written various folks online and have contacted a few people in town, but have had no luck.
Thanks very much,
Larry LeBron
Have you tried all the resets listed here?:
https://www.fixya.com/support/t17323928-lifespan_treadmill_dc_1_code
I repair stuff like this but only if it's not an IC. I.E. anything mounted to a heat sink.
Inspect all the components mounted to a heat sink. Do you see any signs of burning or overheating?
Contact Corecentricsolutions in Carol Stream, IL - they remanufacture boards and may have a suggestion.