INSTRUCTIONS:
1. Simultaneously press both the X button and the power button and hold
2. (NOT simultaneously) press BLUE button then GREEN button then GRAY button (in that order)
3. using blue (or grey) button, scroll-seek to the "information menu" - press OK button
4. press grey button once for "checksum for relock data input" - press OK button
5. press (X) repeatedly until you return to the normal main menu
6. PRINT
Te duci cu imprimanta la aia sa ti-l puna ei, daca e asa de complicat sa pui un cartus!
Eu am o HP c4480.credeam ca-i la fel.http://new-it.ro/tutoriale/eroarea-cartus-lipsa-sau-deteriorat-la-hp-c4280/