HP Probook 4520S Display Ribbon

📌 Part Numbers

The internal LCD display ribbon cable for the HP ProBook 4520S (and compatible models like ProBook 4525S and 4720S) is commonly listed under these service part numbers:

• 50.4GK01.001 — main part number used for 4520S display ribbon.

• 50.4GK01.002 — alternate/compatible cable number.

• 50.4GK01.011 / 50.4GK01.012 — additional compatible cable variants for the same series.

These cable part numbers are documented as compatible with HP ProBook 4520S, 4525S, and 4720S series laptops.

What It Does

The display ribbon cable (also called LCD LVDS cable) carries the video signal from the motherboard to the LCD panel. Without this cable properly connected:

• The screen may show no image,

• Flickering or distorted picture may appear,

• The display may only light the backlight with no actual video.
  These symptoms are classic signs of a faulty or loose display cable.

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