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Small green printed circuit board with connectors and chips

DELL

DELL Alienware m15 R3 m17 R3 Junction Circuit Board HH20M

SKU CH-WBJ8-9Z6WN

Genuine Dell OEM junction circuit board for Alienware 15 and 17 palmrest assemblies

  • Genuine Dell OEM part ensures exact fit for Alienware m15 R3 and m17 R3
  • Junction board mounts under palmrest to restore original connectivity for Alienware m15 R4 and m17 R4
  • Part number HH20M matches Dell service documentation for precise replacement
  • Alternate part numbers LS-J527P, FDQ51, FDQ71 cross-reference to the same component
  • New condition guarantees a factory-fresh board with no prior wear

Genuine Dell OEM Junction Board

This genuine Dell OEM junction circuit board carries part number HH20M and fits Alienware m15 R3, m17 R3, m15 R4 and m17 R4 laptops. It mounts on the underside of the palmrest assembly to connect keyboard, touchpad and power-button signals. Buyers needing a different form factor or a board for another laptop series cannot use this part.

Passive Component Thermals

The board contains no active cooling, fans or heat-generating semiconductors, so it adds no measurable heat or noise to the system. Power draw is limited to the low-current signals routed through its traces and connectors. It operates within the thermal envelope already managed by the laptop's main cooling solution.

Sustained Signal Integrity

Under continuous typing, pointing and power-button use the board maintains reliable connectivity because it has no moving parts or thermal throttling mechanisms. Performance does not degrade over long sessions as there are no semiconductors to overheat. The part simply passes signals for the lifetime of the palmrest assembly.

How it compares

Measured against everything we stock in Motherboard Add-On Parts, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 77% of the 242 comparable items (median $50.49).

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Specifications

Product
Brand nameDell
Model nameAlienware m15 R3 , Alienware m17 R3, Alienware m15 R4, Alienware m17 R4
Part numberHH20M

Questions about this item

How is the HH20M junction board installed and which step is commonly missed?

Remove the palmrest assembly, disconnect the ribbon cables, swap the board, then reconnect every ribbon before refitting the palmrest; the step often missed is reseating all ribbon connectors fully.

What maintenance or replacement will the HH20M junction board need later?

The board itself has no serviceable parts; if a ribbon connector or trace fails the whole board is replaced, so keep the alternate part numbers LS-J527P, FDQ51 and FDQ71 for future sourcing.

What limit appears first on the HH20M junction board under sustained use?

The first limit is usually a ribbon-cable connector losing contact from repeated thermal cycling, which causes intermittent palmrest functions before the board itself fails.

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