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Green circuit board with two USB ports, audio jack and ribbon cable

SMUGDESK

SMUGDESK LSB183P 455MME32L USB Audio IO Board HP ProBook 440 450 G2 455 470

SKU CH-2KVG-FHHRZ

Dual USB and audio IO board with flex cable replaces part LSB183P 455MME32L on HP ProBook 440, 450 G2, 455 and 470 models

  • Exact replacement for HP ProBook 440 450 G2 455 470 series laptops
  • Dual USB ports plus integrated audio jack restore data and sound functions
  • Pre-tested for stable signal transmission and reliable power delivery
  • Direct board-swap design fits without soldering for faster repair
  • Spare part number LSB183P 455MME32L matches original subboard exactly

Exact Replacement IO Board for HP ProBook 440 450

This SMUGDESK LSB183P 455MME32L subboard restores dual USB ports and an integrated audio jack on compatible HP ProBook models. It matches the original circuit layout and connector definition for direct board-swap repair without soldering. Each unit undergoes strict functional testing before shipment to ensure stable signal transmission and reliable power delivery. Ideal for repair shops and DIY technicians replacing a damaged or non-working original subboard.

Thermals Noise and Power Draw in Normal Use

The board operates within standard laptop USB power limits, drawing only the current required by connected peripherals and the audio codec. No active cooling is present, so it adds no audible noise to the system. Heat output remains negligible during typical data transfer and audio playback, staying well within the thermal envelope of the host chassis. Stable power regulation prevents voltage droop that could affect adjacent components.

Behaviour Under Sustained Load

During prolonged file transfers or continuous audio streaming, the board maintains consistent signal integrity without throttling or disconnects. The matched flex cable preserves timing and shielding, reducing errors that can appear with generic cables under heavy utilisation. Rigorous pre-shipment testing verifies performance across extended sessions, not just brief checks. This makes it suitable for workloads that stress the USB and audio paths for hours at a time.

Highlights

  • Exact replacement for HP ProBook 440 450 G2 455 470 series laptops
  • Dual USB ports plus integrated audio jack restore data and sound functions
  • Pre-tested for stable signal transmission and reliable power delivery
  • Direct board-swap design fits without soldering for faster repair
  • Spare part number LSB183P 455MME32L matches original subboard exactly

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the LSB183P 455MME32L board and what step do people get wrong?

Remove the bottom case, disconnect the battery, unplug the old board flex cable from the motherboard, swap the board, then reconnect the cable fully seated; the step most often missed is forgetting to disconnect the battery first, risking a short.

What maintenance or replacement will this USB audio IO board need later?

The board itself has no serviceable parts; if a USB port or the audio jack wears out or suffers liquid damage, the whole subboard is replaced again using the same direct-swap method.

What limit shows up first under sustained heavy use of both USB ports and the audio jack?

The shared flex cable and subboard power traces set the practical limit; pushing high current on both USB ports while driving headphones can cause voltage drop or thermal throttling on the board.

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