Evolution mount no Azimuth only Alt !

[Andrew stuart]

Hoping someone might have an idea. Out last night, all alignments done and happily photographing Bodes Nebula. Decided to look at a couple of star clusters so set keypad to move. It did move but then for some unbeknown reason the Azimuth motor stopped so only altitude worked. Cycled power, up and down on the key pad worked but left and right no movement or noise from the motor. Thought it might be the handset so connected via Wi-fi to my phone and the same up and down but no left or right. Looking to see if anyone has had similar. Thanks in advance.