not spinning

Hi All, Could you help me? I'd usually ask my dad about these types of things, but he lives in a different country. I have a washing machine in my Howden's Kitchen, it is a washer dryer combo. Model name says Howden's joinery HJA8900. In the last few days, the washing cycles have ended up with...

Washer has stopped working.... Can anybody shed some light on whatvhas happened to this carbon brush.... fully siezed up and looks like something has melted on to it. Have replaced the faulty one but still doesnt work.... other one is fine... just makes a humming sound in test mode when should...