We have a client with a number of computers and printers who recently upgraded on of his computers. The upgraded system is an AMD 3200+ with a 64 bit capable CPU. We're running Windows XP professional.
The software for the HP 4050 goes in (downloaded from the HP site) and sees the printer. Everything looks fine until we try to print through LPT1. The printer status shows that the job has gone to the printer but the printer never receives it.
If I use a cable with Centronics on one end and USB on the other (instead of parallel fitting) I can hook the printer to the computer's USB port and everything works fine. Unfortunately, the custom software this client uses is DOS based and, even through windows, requires a parallel port connection to the printer. The software won't print through the USB port.
So, the problem ...
The printer won't work through the standard parallel connection although the system appears able to "see" the printer.
The printer works fine if connected to the computer's USB port.
Client's DOS-based software requires a parallel port connection to print
Changing motherboards has had no affect on the problem.
Hope someone out there can shed some light our the problem and its solution.