If the remote control for your product no longer functions correctly then can you please try the following: Check batteries and replace if necessary. If the remote is capable of operating more than one type of device then please ensure the correct device is selected (i.e. HDD CD or Pre etc.) On the NaimUniti / UnitiQute / NaimUniti 2 / UnitiLite / ND5 XS / NDX / NDS and NAC-N-172 Switch off product wait 30 seconds and then switch on again. While the START UP logo is displayed point the remote handset at the unit and press the AUX and disp buttons simultaneously on the remote handset. The unit should then display 'IR code 21'- if it doesn't then press 'Aux' and 1 simultaneously then AUX and disp simultaneously.