What to do if I accidentally plugged my e-bike charger into my laptop?

What kind of e-bike charger are you using? Some use barrel jacks, while others might go for USB-C. It would help to know the specifics to figure out the potential damage.

Chances are you fried the input circuit, which could mean a blown fuse or other components. Definitely a trip to the repair shop is in order, especially if it's something beyond a simple fix.

It’s possible that you just blew a fuse. Depending on your laptop's age and model, replacing the motherboard might actually be cheaper compared to repairs if the damage isn't too severe. Also, if it’s still under warranty, you might want to keep it on the down low and see if they’ll replace it without question.

Everything can be repaired, but not all shops have the skills to handle board repairs, which might be necessary in this case. It really depends on how much it would cost to fix compared to the laptop's value.

If you can, open up your laptop and disconnect the battery first. After that, connect the battery and see if it turns on. If it doesn't, try plugging in the correct charger. If all else fails, you might be looking at a motherboard replacement which can be cheap unless it’s a high-end model.