Solution To Slow Cutting Through Printer Ports After Installing Certain Model HP Deskjet
Printers:
Models we know about:
-HP Desk Jet 640c &
later
-HP Desk Jet 840c & later
-HP Desk Jet 930c & later
Cause:
HP have introduced a feature called HPIO, which continuously
monitors the parallel port state. This causes interupt to the data flow through
the ports.
Symptoms:
ZIP drives that hang or refuse to save
data, parallel port scanners that go offline or hang during scanning, and
plotters (all types) that are connected to printer (aka parallel)
ports.
Solution:
In Windows, go to Start, Programs, HP xxxx, HP xxxx
tool box. The "xxxx" refers to the particular model HP printer
Right hand
mouse click on the printer icon at the top left of the tool bar, ie immediately
to the left of the letters "HP" and then click on "about"
Holding down
the control key, double click (using left mouse button) on the printer icon at
the centre of the dialog box. Push enter twice until a dialog box appears with
the word "configuration" at the top. Sometimes it is not necessary to push enter
key if only one Deskjet series printer is installed.
Click on the menu
item that says "Remove HP IO", and remove it
Close down all related
dialog boxes and restart computer.