Indesit is70c wont start?

bought 2 is70c off ebay one not working and 1 from another seller working great in my attemt to see whats wrong with the first I changed the capacitor and still nothing then I took the timer from the good one and tried that, still nothing so put back onto good one and now that wont do anything!!! makes a slight buzz when I hit start then thats it.Got the receipt from comet with 2nd purchase so I can use that to repair 1 unit!