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Flat orange ribbon cable with connectors at each end

DELL

DELL Latitude 5420 5430 Palmrest USH Junction Board Ribbon Cable 8XG78 accessory

SKU CH-MA18-1N31B

Genuine Dell OEM ribbon cable connecting the palmrest USH junction board to the motherboard on Latitude 5420 and 5430 laptops

  • Genuine Dell OEM part ensures exact fit
  • Connects palmrest junction board to motherboard
  • Compatible with Latitude 5420 and 5430 models
  • Part number 8XG78 matches original specification
  • New condition ready for immediate installation

Dell Latitude Palmrest Ribbon Cable

This genuine Dell OEM ribbon cable connects the palmrest junction board to the motherboard inside Latitude 5420 and 5430 laptops. It is a new replacement part identified by part number 8XG78. Technicians use it to restore the connection for integrated palmrest components.

Fits Latitude 5420 and 5430 chassis

The cable routes between the palmrest assembly and the mainboard, requiring disassembly of the upper case for installation. It frees the build from intermittent contact issues caused by a damaged or worn original flex cable. No additional adapters or brackets are needed for the repair.

Handles palmrest USH board signals

The flex cable carries all signals between the junction board and the motherboard for the supported models. It runs out when the laptop chassis or motherboard revision differs from the listed Latitude 5420 and 5430 compatibility. Buyers needing a cable for other Dell series or newer generations cannot use this part.

How it compares

Measured against everything we stock in Cable Locks & Laptop Extras, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 93% of the 8,808 comparable items (median $16.99).

Specifications

Product
Brand nameDell

Questions about this item

Does the 8XG78 ribbon cable carry enough bandwidth for continuous fingerprint-reader use?

The cable is a genuine Dell OEM flex interconnect designed to link the palmrest USH junction board to the motherboard on Latitude 5420 and 5430 systems, so it supports the fingerprint reader’s normal data rate.

Will the 8XG78 cable overheat or add audible noise when the laptop runs all day?

It is a passive flat-flex ribbon with no active components, so it generates no heat of its own and makes no noise during extended operation.

Must I already own a Latitude 5420 or 5430 palmrest with the USH junction board for this cable to work?

Yes, the 8XG78 connects that specific palmrest-mounted USH junction board to the motherboard in Latitude 5420 and 5430 models.

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