Greetings,
All I could find on the MP280.
https://support.usa.canon.com/kb/index?page=content&id=ART109210&actp=search&viewlocale=en_US&search...
You don't have many options if the waste ink pads are full. Use google for steps to clean the pads and clear the error. The parts are not user serviceable, but you might find a work around which will buy you a little time.
My recommendation is replacement since the cost of shipping and service will exceed the price of a new printer.
~Rick
Bay Area - CA
~R5 C (1.0.6.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, +RF 1.4x TC, +Canon Control Ring, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve ~Windows11 Pro ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8
~CarePaks Are Worth It
