Can I fix my Hotpoint Aquarius SDW60 ?

My SDW60 wont wash dishes at all. At the end of the cycle the dishes are as dirty as when I put them in and the dishwasher tablet is lying unaltered at the base of the machine.
It shows 2 flashing lights, one being fast the other is delicate. I understand these are error codes.
Is it something I can fix knowing nothing about electrics? I really don't want to go to the expense of a repairman or buying another if its not necessary?
Thank you