Question

after installing a new motherboard, a technician notices that the front usb ports on the case are not working. what is the most likely reason? a) the usb ports are disabled in bios b) the front - panel usb header was not connected c) the psu 24 - pin connector is unplugged d) the sata cables are reversed

Explanation:

When the front - panel USB header is not connected, the front USB ports will not work. Disabling USB ports in BIOS would affect all USB ports (not just front ones). Unplugging the PSU 24 - pin connector would lead to more serious issues like the system not powering on. Reversed SATA cables affect storage devices, not USB ports.

Answer:

B. The front - panel USB header was not connected.