You would not void the warranty, in fact we often ask teams to do this to solve the unit detecthing a short:
Open the device using the four screws on the back and the two screws at the port port and clean the unit off using compressed air. (Maybe also use a flashlight to inspect the board closely for any remaining metal shards and remove them as well.)
While I would expect a red power light if a short was the cause, do you want to go ahead and check this to be certain?
