If the power supply (charger) is short, then just replace the charger, unless its the charging circuit itself that is shorted.

Avoid

It’s a massive upgrade over what you have now both in terms of performance and battery life.

Not a good deal as this is only a mid-level configuration of this now older workstation.

Furthermore, the 75XX series (7510-7560) have terrible reliability issues with their system boards regularly failing.