Windows 8.1. Working Thursday, not working Monday morning

[pjfb]

HP Spectre notebook with Windows 8.1. It has worked flawlessly for months (Targus ACP70) but suddenly Monday morning = no network or display.

I have tried cleaning drivers, rebooting, reinstalled drivers multiple times. The USB component work but no network adaptors and no display mirroring. I have power cycled multiple times also, tried different USB ports.

I'm thinking it's a hardware issue?