How can I fix the 5B00 error on my Canon G2010 printer?

The primary fix involves resetting the waste ink counter. This is typically done by entering the printer's service mode using a specific button sequence (often involving pressing and holding the Power button and then repeatedly pressing the Stop/Reset button). Once in service mode, a further button sequence will reset the counter. For a long-term solution, it is highly recommended to physically replace the saturated waste ink pads in addition to performing the counter reset.