It's going to cost you if your not handy as the problem is more than likely a small board which sends a message to a relay, but not the relays of the good old days.
Is hot hose connected to hot faucet and cold to cold? When you had hoses off did you make sure water was coming out when cut on at faucet? If all is well with hoses and water supply, then your water valve may be bad. It also could be a control board issue