Acer aspire 5332 keyboard not working

Probably need a new keyboard, available on Ebay (About £14 in UK) Plus you will need a Service Manual, just google Aspire 5332 Service Manual and download the pdf. I would remove the keyboard and check the ribbon cable connector first in case it has come loose, before ordering a new keyboard. Also with the keyboard removed it is easy to clean, turn upside down and use a small bush to remove particles that may be causing keys to malfuncion...