I can't turn on my canon mg5220 printer. I checked the power source and it's fine. What do I do?

Hi Stephanie, the bad news is your machine is toast. However if you remove the cartridges and printhead, you may be able to pick up one of the following second hand that use the same QY6-0080
Printhead. The QY6-0080 fits iP4820, 4910, 4920, 4970; iX6510,6520; MG5210, 5220, 5270, 5310, 5320, 5370; MX711,712,714,715, 882, 886, 892, 894, 895, 897. The printhead is worth more than the machine. Otherwise just buy the latest equivalent model and throw the dead one away.

From the User manual. I draw your attention to the last line. If you can find a logic board cheap enough, it may be worth your effort to replace it. Personally, I'd recycle it and buy another. Printers are relatively cheap.

The Machine Cannot Be Powered On

• Check 1: Press the ON button.
  

• Check 2: Make sure that the power plug is securely plugged into the Power Cord Connector of the machine, then turn it back on.
  

• Check 3: Unplug the machine from the power supply, then plug the machine back in and turn the machine back on after leaving it for at least 3 minutes.
  

  If the problem is not resolved, contact the service center.
  

Sound like you have a logic board or head problem .Did your area have a recent storm?
You can try to unplug it from the outlet for a few minutes and plug it back in.
If it does not work then it may be a doorstop.
Canon does offer a one year warranty with this.
If past a year warranty they usually give a discount on a new purchase from their store

Have you tried holding the power button down for about 5 secs?Has it been operating ok before?