I have an XPS 8910 out of warranty.  Both USB 2.0 ports for KB and mouse stop working.  Now one 3.0 port has stopped.  Soon won't have any ports for mouse and KB at all.  With KB in a 2.0 port, cannot get into BIOS.  KB and mouse just makes a blink at start up and then no light.  BIOS is 1.1.5, Windows 10 just updated today, no help. In device manager, no yellow tags on any USB controller.  Bios has all ports enabled. Bios diagnostics OK.

Is mother board done ?