Sorry if this has been covered ( ran a forum search and nothing came back~please point me to another thread if this re-hashing solved problem).
I recently restored my 3880 that is fitted with the old SEL ink-set and started cleaning and recalibrating. Everything was great until this morning when my PK cart was not recognized and after getting it to recognize the other cartridges became unrecognized.
Until today, I was able to run clean cycles, print a couple of positive test prints and two digital negs (which I did over the past two weeks). Printer was running every few days.