Is my Mira shower pump likely to be dead !!??

Hi, I have a Mira Event shower and although i can still get water flow, the pump has stopped working. To operate the pump, I usually have to pull the cord which also turns on the extractor fan. At the moment the fan still works but the shower pump doesn't. A (plumber/bathroom fitter) friend of mine had a quick look and said it could be the brushes that are worn down (shower is approx 10 yrs old). I have replaced the brushes although the pump moved slightly to begin with, it now doesn't move. Any advice/suggestions?