I have refilled the cartridges on my HP Pho...

When refilling an inkjet cartridge that contains a chip, the chip records when the cartridge goes low and then empty. The chip needs to be replaced to eliminate the low or out message. You can set the printer to continue printing when it receives an out message even though there is ink available. However if you do run the printer and there is no ink flowing it can cause damage to the prinheads.