Main Board Motherboard CQ16987 / CQ16987-4 REV A — Fits QL420 QL 420

Replacement mainboard marked CQ16987 (CQ16987-4), Revision A. Compatible with QL420 / QL 420 models. This motherboard is intended as a direct replacement for units using part number CQ16987 or CQ16987-4 REV A. Please confirm your device shows CQ16987 or CQ16987-4 REV A before purchasing.