I took the magazine out, cleaned it up with Mr Sheen to help it in the future. Loaded the cartridge and popped it back in. 1st the HU said 'no magazine', then I could hear it loading the cd's etc. After finishing it displayed 'no disc'. I clicked the source button again and it showed TR....., that was it not TR001, just TR and not a sound from it..... I couldn't change to a different cd using the number buttons, so I presume its a duff unit?