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Small green circuit board with sensor components for Dell Precision laptops

DELL

DELL Precision 7550 7560 Proximity Hall Sensor Board J177P

SKU CH-Z1RM-9VHZM

Proximity and Hall-effect sensor board for Dell Precision 7550 and 7560 laptops

  • ProcessorLaptop-computer-replacement-parts
  • Genuine Dell OEM part for Precision 7550 and 7560
  • Replaces faulty proximity and Hall switch sensors in screen assembly
  • Direct fit for part numbers FDX50 and LS-J177P
  • New condition ensures reliable lid-close detection and sleep functions
  • Supplied exactly as pictured for straightforward installation

Genuine Dell Proximity Hall Sensor Board

This genuine Dell OEM sensor board integrates a proximity sensor and Hall switch for Precision 7550 and 7560 laptops. It mounts inside the screen assembly and carries part numbers FDX50 and LS-J177P. The component is supplied new and matches the original factory specification.

Replaces a faulty lid-sensor module

When the original board fails the laptop may not detect lid open or close events, breaking sleep and wake behaviour. Swapping in this OEM part restores the intended proximity and Hall-switch function without requiring a full display assembly change. The repair is worthwhile whenever diagnostics point to the sensor board itself.

Suits technicians repairing Precision 7550

Repair shops and owners servicing those specific models can use this board to return the lid-detection feature to factory operation. Builders working on other Dell series or non-Dell hardware should look elsewhere because the connector and mounting are unique to the listed Precision models.

How it compares

Measured against everything we stock in Sensors, Transducers & Thermometers, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 99% of the 255 comparable items (median $39.99).

Specifications

Product
Brand nameDELL
Processor
ProcessorLaptop-computer-replacement-parts

Questions about this item

Does the J177P proximity hall sensor board fit both the Precision 7550 and 7560 laptop screen assemblies?

Yes, the board is listed as compatible with Precision 7550 and Precision 7560 models and mounts inside the display assembly.

How is the FDX50 sensor board installed in the display assembly, and what step is often missed?

The board sits in the screen bezel area; the step often missed is reconnecting the fragile flex cable to the system board before reassembling the bezel.

Will the LS-J177P hall switch sensor require periodic recalibration or replacement during the laptop's life?

The hall sensor is a solid-state component with no moving parts and does not require recalibration; replacement is only needed if the part fails.

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