{"product_id":"liftmaster-k001d8439-mc","title":"LiftMaster K001D8439-MC CAPXL Power \/ Internet Board","description":"\u003cp\u003e\u003cstrong\u003eThe LiftMaster K001D8439-MC is a replacement power \/ internet board for the applicable CAPXL \/ CAPXLV access-control portal revision. The offered reference is K001D8439MC; base reference K001D8439. It is an internal service component, not a complete intercom or a universal board for the CAP family. Match the original label and the portal’s parts documentation before ordering. A failed visitor call, blank screen or offline portal can involve several components, so identify the actual fault before replacing this board.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eCompatibility — Models, Versions and Exclusions\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel or selection point\u003c\/th\u003e\n\u003cth\u003eCompatibility requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCAPXL \/ CAPXLV documented base board\u003c\/td\u003e\n\u003ctd\u003eManufacturer repair lists identify K001D8439; confirm the offered MC revision for the installed unit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK41-0112-000 control board\u003c\/td\u003e\n\u003ctd\u003eA separate component with a different service function.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK002A1978 external power supply\u003c\/td\u003e\n\u003ctd\u003eSeparate from the internal power \/ internet board; diagnose the supply before replacing portal electronics.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCAPXLV2 and other CAP models\u003c\/td\u003e\n\u003ctd\u003eNo cross-generation fit established.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eIdentify the Board’s Function Before Choosing the Repair\u003c\/h2\u003e\u003cp\u003eThis board is identified for power and internet functions within the portal. It should not be confused with the main control board, a door-interface board or the external power supply. An apparent loss of portal power or networking needs a systematic check of those separate elements. Confirm the complete part reference rather than choosing by board color or a similar connector arrangement.\u003c\/p\u003e\u003cp\u003eRecord the existing portal model, original board reference and observed fault. The access-control system also depends on its power supply, network, field wiring and configured services. A replacement board does not itself renew a subscription, restore a failed internet connection or repair an external lock. Have the technician check the system and preserve the information needed to restore operation after service.\u003c\/p\u003e\u003ch2\u003eSpecifications and Product Identification\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplier SKU\u003c\/td\u003e\n\u003ctd\u003eK001D8439-MC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eService reference\u003c\/td\u003e\n\u003ctd\u003eK001D8439MC; base reference K001D8439\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComponent\u003c\/td\u003e\n\u003ctd\u003epower \/ internet board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEquipment category\u003c\/td\u003e\n\u003ctd\u003eCAPXL \/ CAPXLV access-control portals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelection requirement\u003c\/td\u003e\n\u003ctd\u003eExact portal generation, board label and approved service replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNot established\u003c\/td\u003e\n\u003ctd\u003eCompatibility with CAPXS, CAPXM or CAPXLV2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePhotograph the portal label and the complete original board number.\u003c\/li\u003e\n\u003cli\u003eConfirm the approved replacement for the hardware generation.\u003c\/li\u003e\n\u003cli\u003eHave power, connections and the relevant network or field wiring inspected.\u003c\/li\u003e\n\u003cli\u003ePlan configuration recovery and testing of every controlled entrance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents and Separate Requirements\u003c\/h2\u003e\u003cp\u003eThis listing identifies the named board service item. A touchscreen, faceplate, camera, door-control board, external power supply, lock or complete wiring harness is not promised as included. Confirm the supplied revision and carton contents before ordering. An exploded diagram can show several boards in one cabinet without making them one replacement package.\u003c\/p\u003e\u003ch2 class=\"safety-warning\"\u003eSafety Warnings — Read Before Installation or Service\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWARNING: Access-control service can affect door release and gate movement. Use a qualified access-control professional and maintain a safe access arrangement during the repair.\u003c\/li\u003e\n\u003cli\u003eIsolate the relevant power sources before handling boards or changing connections. Follow the manufacturer’s static-handling and wiring instructions.\u003c\/li\u003e\n\u003cli\u003eDo not bypass locks, egress functions or gate-protection devices to conceal an unresolved fault.\u003c\/li\u003e\n\u003cli\u003eAfter service, test portal communication, authorized release and the controlled openings’ independent safety functions before normal use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Products and Important Differences\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-wireless-security-20-keypad-metal\"\u003eKPW250 wireless keypad\u003c\/a\u003e — a different access method for compatible gate operators; it is not a replacement board or guaranteed backup for a CAPXL portal.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmrrul-monitored-retro-reflective-photo-eye\"\u003eLMRRUL monitored photo eye\u003c\/a\u003e — a separate protection device for approved gate operators; portal electronics do not replace its safety function.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs this the main control board?\u003c\/h3\u003e\u003cp\u003eNo. The parts list identifies the control board separately as K41-0112-000 in the applicable revision.\u003c\/p\u003e\u003ch3\u003eWhy does the manual show K001D8439 without MC?\u003c\/h3\u003e\u003cp\u003eThe manual uses the base reference. The supplier offers K001D8439MC; confirm its approved replacement relationship with the actual installed revision.\u003c\/p\u003e\u003ch3\u003eWill the board alone fix an offline portal?\u003c\/h3\u003e\u003cp\u003eNot necessarily. The supply, network, wiring, configuration and service account also require diagnosis.\u003c\/p\u003e\u003ch3\u003eAre all CAP-family boards interchangeable?\u003c\/h3\u003e\u003cp\u003eNo. Match the exact portal generation and service reference. CAPXS, CAPXM and CAPXLV2 are not established as compatible here.\u003c\/p\u003e\u003ch2\u003eNeed Help Confirming the Right Product?\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/garage-doorparts.com\/pages\/contact\"\u003eContact Garage-DoorParts.com before ordering\u003c\/a\u003e. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.\u003c\/p\u003e","brand":"LiftMaster","offers":[{"title":"Default Title","offer_id":60655774302494,"sku":"K001D8439-MC","price":360.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2781\/5710\/files\/k001d8439-mc.png?v=1793139910","url":"https:\/\/garage-doorparts.com\/products\/liftmaster-k001d8439-mc","provider":"garage-doorparts.com","version":"1.0","type":"link"}