Antminer T17e has a locate function which can be activated from the web browser like so
For S9k and S9se, if you don't want to use any 3rd party firmware/tool you could simply add any character to your pool setting to make the pool or worker details invalid, your miner will flash the red led indefinitely and that should be enough time for you to locate the machine, if you don't own a lot of miners and all of them are within your line of sight, a simple reboot will do, you will notice a different led combination on the miner that is booting up vs the once that are mining.
