The printer self-diagnost with the maintances it needs automatically. There isnt too much to do after that. You can find these maintances on "Settings" then "Preventive maintance taks".
Having said that, I would take a look at the PSU intake rack. Many times I have found that rack full of dust which prevents the PSU from breathing, breaking the power supply as a result.
I'll leave you an image so you can see where is it located.
It's located under that cover I pointed for you in red.