I have been given a used Oster® PrimaLatt BVSTEM6601 coffee maker but neither steam nor milk works well, the solenoid valve does not receive current, if I put it in cleaning if but if I put it in cappuccino or latte nothing, the pump is heard I have connected external power to the solenoid valve and it works well, the espresso coffee fills my base and I have to press it to stop, it gives me the sensation that only works in manual can someone provide me with the electrical diagrams of this coffee maker or something that I can control He already had this breakdown and was charged 95.- euros as I see in the forum this problem is vast common