Is it safe to turn on my laptop?

Completely safe. Just turn it on, if the worse comes to happen, the fuse on your laptop will protect from something going really bad. The USB port can be in short that wont break it, but what could happen is your boot will take long then come on with an error like "device not responding" or something like that, that gives you time to do what you need before sending it to repair.

To fix the USB port, they'll have to replace the entire motherboard. That's right, the entire board.

A major cost of a laptop is the main board.

Sooo, in my opinion, there's not much worse you could do. Visually inspect the port to make sure you got every bit of conductive material and turn it on at your own risk. I would.

As long as it's only the USB port damaged, you should be good to go.

You PC does not use the USB to load the PC, instead it reads from it's BIOS and thehard drive. The only time it will read the USB is if there is something plugged in it.

it is probably safe to use the computer, at your own risk.

I think most of the computer will work ok, even if you short out the USB port.

i think so switch it on and jump away really fast on the ground with youre hand covering youre face and ears wwith your but in the air that should do it

Should be OK