We tried reaching you on a private message asking for the Service Tag number to ascertain the warranty but did not receive a response. Please feel free to reply to the private message whenever you are available.

Try here -- it's for Latitude systems, but the Precision firmware is very similar.

https://www.dell.com/support/kbdoc/en-us/000131551/bios-settings-to-allow-pxe-boot-on-newer-model-dell-latitude-laptops