Code 5B00 (also 5B01/1700) means the waste-ink absorber counter has reached its limit. The proper fix is replacing/servicing the absorber pad; a software reset only clears the counter temporarily.
Work through these in order; most people are fixed by the first two or three.
This is a maintenance limit, not a random fault — the absorber that catches waste ink is near full. Continuing without service risks ink overflow.
The correct fix is having the waste-ink pad replaced (a service center) so it can safely hold more waste ink.
A service-mode reset can clear the counter to keep printing short-term, but only do this knowing the pad still needs attention.
On inexpensive models, replacement may cost less than service — factor that in.
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