Digital BW, The Print

Paul's recommendation to poach the yellow chip should work. I had the
same problem once on my C86, and that solution worked for me.

It's possible the chip isn't defective, and that it simply needs to be
reset with a chip resetter. So I wouldn't toss it yet.

As you may already know, MIS sells an Epson chip resetter (about $20),
as well as spare chips.