Won’t turn on, power lost internally (Lenovo 330s i7)

Lenovo IdeaPad 330S-15ikb I7 core

Hello my laptop randomly shut off in January during normal usage and has had no power or signal of any kind since. I have taken it to a repair place where they fixed a blown capacitor but couldn’t trace the signal from charger to battery (I think) and they gave up.

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not sure what other info to provide.

I have the schematics but not sure how to post PDF330S KBL Silkscreen LO2

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