Then, if he believes it is warranted, he'll send you a shipping box. You put the laptop in the box. Give it back to the person who dropped off the box. And the computer is on its way back to the service center, where it will be repaired and sent back to you. I have found the usual turnaround time to be about three days.
Some vendors also provide drop-off service.
This is particularly handy when you won't be in the same location long but need your laptop while you're there. If you travel often to the same destinations, check with your vendor in advance to see whether the vendor has a service center in those cities. Before your trip, make sure that you back up your files. Bumps and hits can ruin a hard drive. If your data files are only on your laptop, you're liable to lose them forever when your disk crashes.