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Fourth generation 2-In-1 convertible laptop released on 2015. Succeeding the Yoga 3 Pro, the Lenovo Yoga 900 (also known as the Yoga 4 Pro) sports a durable 360° watchband hinge, an ultra thin chassis, and extended battery life.

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Does anyone know where I can purchase a 1050 IO board as shown on

page 39 of the hardware manual? The on/off switch has broken off, on the circuit board.

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Hi @san_snead ,

Search for 5C50K48444 to find suppliers of the right I/O board for the laptop.

The part number was found from this parts list for the laptop.

Click of Select Commodity > Cards Misc Internal (2) to find the part number and 5 images (photo) of the part

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The part is presently unavailable. It is too bad since the computer won't work without the I/O board. Thanks for your help.



Might depend on where you are I suppose.

See this link



I ordered the board last night from the West Coast. Hopefully there are no issues with the board or my order. Thanks for the eBay link.


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Greg Banks será eternamente grato(a).
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