With the charger connected to the laptop, you should get 20V DC when measuring between the red and black wires of the [https://www.amazon.com/Lenovo-80WK00F9US-Y520-15IKBN-Compatible-5C10N00259/dp/B07HKVWSTV|DC-IN jack] cable plug, when it is disconnected from the motherboard.
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With the charger connected to the laptop, you should get 20V DC when measuring between the red and black wires of the [link|https://www.ifixit.com/products/5c10n00259-lenovo-laptop-dc-in-cable-genuine|DC-IN jack] cable plug, when it is disconnected from the motherboard.
If you're not getting this at that point, then there's a problem with the charger or the DC-In jack.
Hi @leghostyx,
With the charger connected to the laptop, you should get 20V DC when measuring between the red and black wires of the [https://www.amazon.com/Lenovo-80WK00F9US-Y520-15IKBN-Compatible-5C10N00259/dp/B07HKVWSTV|DC-IN jack] cable plug, when it is disconnected from the motherboard.
If you're not getting this at that point, then there's a problem with the charger or the DC-In jack.