how to fix mainboard printer epson tx121 no power ? how to fix power suply printer epson ?

iceng4 years ago
Take it to a computer or Epson repair shop.

I say this because you have No Skill Set to do whatever
listed on your page.

You obviously know how to use a screwdriver.
If you know how to use a multimeter, Good !
If you know how to test a circuit fuse, Better !
If you solder, Great :-)