It could be that your hair clipper is dirty and therefore not working properly. Your Philips hair clipper needs to be cleaned regularly.
1) Take off the attachments of the hair clipper.
2) Rinse the attachments under tap water.
3) Clean the inside of the clipper with the little brush provided. Do not rinse the main body of your device, as this is not waterproof and any contact with water can damage the machinery.
For more advice on cleaning please refer to the user manual.
If you have tried the above troubleshooting advice but your hair clipper is still not working, then please contact us for further help.