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Flat flexible ribbon cable with connectors on both ends, Dell part 4FXC1

DELL

DELL Latitude 7320 Palmrest USH Junction Board Ribbon Cable 4FXC1

SKU CH-VR51-GT77V

Genuine Dell OEM ribbon cable connecting the palmrest USH junction board to the motherboard on Latitude 7320 and 7320 2-in-1 laptops

  • Genuine Dell OEM part ensures exact fit for Latitude 7320
  • Connects palmrest USH junction board directly to motherboard
  • Compatible with Latitude 7320 and Latitude 7320 2-in-1 models
  • Manufacturer part number 4FXC1 matches service documentation
  • New condition guarantees reliable signal integrity for security functions

Genuine Dell OEM palmrest junction cable

This genuine Dell OEM ribbon cable connects the palmrest USH junction board to the motherboard in compatible Latitude laptops. It carries the Dell part number 4FXC1 and matches the alternate references GDC31_USH_BOARD_FFC and NBX0002QJ00. The component is designed specifically for the Latitude 7320 and Latitude 7320 2-in-1 models.

Passive flex cable with no active cooling

The flat ribbon construction carries only low-voltage signals between the palmrest board and the mainboard. It draws no measurable power of its own and adds no audible noise or thermal load to the system. Installation simply routes the flexible circuit through the existing chassis channels.

Factory-built flex for exact chassis routing

The cable length and connector pitch follow the original Dell layout, so the part fits the existing retention clips without modification. It restores the fingerprint reader and palmrest functions when the original cable is damaged. Buyers needing a different laptop series or a motherboard-level repair will not be served by this single flex cable.

Highlights

  • Genuine Dell OEM part ensures exact fit for Latitude 7320
  • Connects palmrest USH junction board directly to motherboard
  • Compatible with Latitude 7320 and Latitude 7320 2-in-1 models
  • Manufacturer part number 4FXC1 matches service documentation
  • New condition guarantees reliable signal integrity for security functions

Specifications

BrandDell

Questions about this item

How do I install the 4FXC1 ribbon cable between the palmrest USH junction board and the motherboard on my Latitude 7320?

Route the flexible flat cable through the chassis channel, align the exposed contacts with the ZIF connector on the motherboard, flip the locking bar down to seat it, then connect the opposite end to the palmrest board using the same ZIF method; the step most people miss is fully closing both locking bars before reassembly.

What maintenance or replacement will the GDC31_USH_BOARD_FFC cable need over time?

The ribbon cable itself requires no scheduled maintenance; it is replaced only if the USH fingerprint reader or palmrest buttons stop responding due to a cracked flex or corroded contacts after repeated lid cycles.

What limit appears first on the NBX0002QJ00 cable during sustained daily opening and closing of the Latitude 7320 lid?

The copper traces inside the flex can fatigue after thousands of hinge cycles, leading to intermittent USH signal loss before the connectors or insulation show any wear.

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