On Feb 8, 9:29 pm, Colin Wilson wrote:
HP colour cartridge - old stock - blue and cyan OK, yellow not
working...any top tips for persuading it to? or surefire ways to knwo
its sh@gged and better get another? :)

Depending on the cartridge, ISTR they started to "force" the "use by"
date on the cartridge by reading the date from the electronics in the
cart and refusing to print once the date passed...

ah - well it will print in colour but minus any yellow - so cyan and
magenta are OK and it's a vintage HP840C so doubt there's anything
flash about it...

ta
JimK