MAXIFY MB5120 won't start up

[5120_]

Any startup suggestions for MB5120 that hasn't been used in 3 years. It sat in storage in my house last 3 years. New in 2021. I assume inkheads probably dried out. 

thanks

DM

[rs-eos]

By "won't start up", you mean there is no indicator lights of any kind that turn on? No mechanical sounds?

If it won't power on at all and you've tried the steps on page 977 of the User Manual, you'd need to contact Canon and request a repair.