HP2610 will not print. Getting "remove and check cartridge..."

I just had this same problem (cartridge on left). Something had broken that was holding the little metal wire in place--the one that sticks out along the bottom where your cartridge goes but apparently moves to the side when you install the cartridge. My guess is that this wire may make some sort of electrical connection that indicates when the cartridge is all the way it (if it doesn't move--or if it is broken--it doesn't make the connection and it thinks something is wrong with the way the cartridge is installed. So I used a strip of tape to hold the wire in place on the side of the cartridge compartment (it had been loose and flopping around), and it works fine now.