Genuine OEM Main Board PCB – Fitbit Sense 2 (FB521) This is an original Fitbit factory main board (PCB) removed from a working device. It is a direct replacement for the Fitbit Sense 2 (Model FB521) and is ideal for resolving issues related to power failure, boot loops, Bluetooth/Wi-Fi problems, or internal board damage. Watch This Repair Video: https://youtu.be/-T8tXvlnydA No corrosion, repairs, or damaged connectors Clean board with original components intact Type: Main Logic Board / Motherboard PCB 1× Genuine Fitbit Sense 2 Main Board PCB Original JoesGE QC/serial label attached Professional installation is strongly recommended Firmware pairing or calibration may be required after installation Confirm compatibility with Fitbit Sense 2 (FB521 only) before purchase Does not include screen.
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