How can I get my Hinari 001 to generate steam again?

Hi I have the above Steam Generator, instruction booklet shows HIN001 Iss 5 12/97, and whilst ironing yesterday, I stopped to fold a garment and when I went back to ironing it had stopped generating steam. Tried obvious checked water level, switched off/on no different. However did notice the steam level button at the back was illuminated bluey/orange and not bright orange as it is usually is, matching the power button which was still illuminating bright orange. Can't remember exactly when purchased but don't think it was more than 2 years ago.