Hada Crie Hitachi CM-N830 user manual original box power adapter device and coil included but device won't turn on unsure if device or power adapter is faulty

If the same situation occurs and you want to try to fix the device you can test it the owner took good care of the device but after several months of not using it due to skin sensitivity it won't turn on I won't mention the original price just want to see if there are people who take care of their devices and can arrange to repair it test their own power adapter or check if the device itself is faulty