Factory reset acer Iconia tablet a500

Have Acer Iconia Tablet A500. NOT rooted. Forgot pattern. Screen went to sign into Google. Have two Google profiles associated with this tablet. Have tried bluetooth (no longer an option - phone lost 3g). Tried manipulating toggling keys and switches - no response. Tried USB keyboard, used esc key - got different lock screen, no response. Icons on status bar unresponsive. Stuck paperclip in reset hole - screen went black for a moment then back to Google sign in screen. Won't go online, no longer sees internet hot spot or homegroup. Took scandisk out, put in, toggled, pushed - no response. Using Asus k501j laptop on cable (no bluetooth), tethered USB to tablet - recognizes tablet as a camera. Downloaded some Acer tablet files, extracted and combined. Attempt to read tablet - no response. My brain is stuck on "what next?" Not a techie - require simple, step by step direction. Thank you!