This Acer Aspire 3 laptop, model A315-21-47b4 turns on and works, but most of the keyboard does not function. Must use 'ease of access keyboard' in order to operate and get through the computer, or simply hook-up an additional keyboard for it to work. Runs a little laggy also, but did do a full factory reset, and have not gone any further from there on to see if it runs smoother. Again, as is, for parts.