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Thunderbolt 3 PD is not working on USB-C

Hey!

 

I have an LG UltraFine 4K (24MD4KL-B) display that has TB3 ports with PD it works all good with my MacBook (TB3).

 

But it won't charge my Windows laptop with USB-C (3.1 gen 1 with PD) even though video / audio works fine.

 

Tried with both TB and USB-C cables, charging never works, but it worked with USB-C PD display and the same laptop before.

 

What am I missing?

 

Thanks!

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