... a wreck yesterday and a vehicle ran into a power line. .. Our computer was fried.
It can create too many possible anomalies. No one solution exists for all possible anomalies. But most anomalies that harm a computer typically only harm one tiny internal part. For example, I recently fixed a Canon multi-function printer/scanner/fax. The entire damage was one 4mm by 4 mm part. Hardest part is holding that part in place while soldering. Hands shake too much.
In your case, protection from most anomalies already exists inside a Mac's power supply. Did the anomaly overwhelm that protection? No problem. I replace the one part. Most techs cannot do that. Tech will swap out a power supply or something just as simple. Depends on which anomaly did damage.
Was that computer plugged into a protector. Sometimes that protector bypasses protection inside the supply. Connects a destructive transient into a motherboard. But again, damage is typically one tiny part. Often where that transient current exited (ie on a modem, NIC, USB device, etc).
Nobody can suggest a solution on such scanty information. Best is to take it to a shop where someone will see the failure before recommending a solution. You have almost zero reasons to believe the entire Mac is fried. That fear is mostly found when solutons are recommened without first identifying the defect. If the shop says everything if fried, then get another shop.
Now, if car and pole created a typical destructive anomaly, then today it was a computer. Tomorrow, maybe a dish washer. If you do not earth the resulting current before it entered your building, then all appliances are at risk. Next anomaly may select something different - like the furnace. Learn from this 'canary in a coalmine'. Next time may be more serious because you did not install a superior solution that costs about $1 per protected appliance.
Not only get the Mac fixed. Also address typical reasons for an anomaly that overwhelmed a Mac's existing protection.
