If it is leaking, you can first see if it is a joint, a water pump, a pressure barrel or something. If the water quality is not good, see if it is necessary to replace the filter element or RO membrane. If the water doesn't come out, see where it is blocked.
I know a company: Shanghai Shanruo Pure Water Equipment Co., Ltd. specializes in the installation and maintenance of various pure water machines. Good technique and attitude. You can contact and have a look, and you will know what your machine is like. Please contact and have a look. I hope I can help you.