CoCo: Cartridge Expiration Date Workarounds : "In light of the lawsuit against Hewlett-Packard over the expiration date of their cartridges, two ways to fix the problem that presumably work are easily found online: 1) Remove and reinsert the battery of the printer's memory chip First, I disconnected the power and the printer cable, just to be sure. Then, I reached inside and carefully removed the battery. I waited for about an hour, and then reinserted the battery and plugged everything back in. Viola! I was able to make a copy. Tried printing-- that worked too. 2) Preemptive: Change the parameters of the printer driver Search for hp*.ini and edit the ones with the latest dates. If you configure the printer driver first, see below, the file date should read today. In it there is a parameter something like pencheck. It is set to 0100. I think this is a boolean because I tried other values without effect. Set it to 0000 in the file and save the file and REBOOT."