Missing characters, missing print barcode lines

Hi, It's been a while since I worked on these, so I'll go out on a limb (as far as my rating goes) and say that the few times I've seen that happen usually results from a bad network card. Now you may not be using a network card, so if your not then I'm not really sure what would cause that to happen on the printer side. The environments that I've seen that happen in are with an AS400 and the network card just gave out. You most likely tried this, but you might want to make sure that the computer isn't using one driver for both printers. Good luck.