No power or a MacBook that will not turn on can cause so many different issues. A logic board fault is the most common, but it could also be caused by a faulty screen, touchpad, PowerBrick keyboard, or even a shorted charge socket or bad battery.
Like liquid damage, it is impossible to give a quote for repair without seeing the device to diagnose the issue, as it could be a simple 10-minute job or a marathon event of diagnosing, repairing, and replacing chips and power rails.
As always, diagnostics is always free, and I offer a no-fix, no-fee policy.
VIDEO
In the linked video is a live repair of a Macbook Pro that came to me with no power issue. The customer said, “After using an aftermarket charger, the Mac would no longer power on.” Both USB-C management chips (CD32 chips) had blown,