After you unscrew the back cover off the chair you will see something like this. Each massage chair has several motors that makes the chair functions.
How to Repair Most Massage Chair
Massage chairs are great inventions that make it possible for consumers to avoid a massage therapist and get a head to toe massage in the comfort of their own home. Chairs range from full-body massage to pinpointing certain areas. There are many brands to choose from, including Panasonic and Sanyo. One of the pluses of the massage chair is the easy repair instructions that come with many to help keep your massage chair in perfect working order for complete relaxation.
Check the power and remote cords if the chair is not operating properly. Ensure that everything is connected to its proper place and that no cords are frayed or damaged.
Check the outlet where you have your chair plugged in. Do this by plugging in something else or plugging your chair into another outlet to see if you regain power.
Unplug and turn the power button off on your chair to check for a blown fuse. This should be simple and requires only a screwdriver. The fuse should pop right out. If it is blown, simply replace it with a new fuse of the same kind.
Plug the massage chair back in and see if it has power. If not, you may have to replace the PCB box. Contact your chair's manufacturer for instructions.
Tips & Warnings
1. It isn't only the inside of a massage chair that can be damaged. The upholstery is thin and can take a beating over time. The best thing to do in this case is to directly contact the place where you purchased the chair and see if it is still under warranty.