Why has my kenwood chef A701a lost power?

My ancient, inherited, kenwood chef A701a has been resting in a cupboard for some years. Having resurrected it to mix a cake, I discovered it didn’t have enough power to mix the dough. What ails this old faithful?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0