HP LaserJet 3020 All-in-One Printer - Manual (Page 105)

Onscreen error messages appear
If the following messages appear onscreen, use the appropriate procedures to remedy the
problem.
Printer not responding/error writing to LPT1
Check the following conditions:
● Is the device in the Ready state?
● Are the power cord and IEEE 1284-B-compliant parallel or USB Device Cable (A/B)
correctly connected?
● Are other printer drivers installed on the computer?
Try the following remedies:
● Disconnect the power cord and the IEEE 1284-B-compliant parallel or USB Device Cable
(A/B) at both ends and reconnect them.
● Use another IEEE 1284-B-compliant parallel or USB Device Cable (A/B).
● Make sure that another device or printer is not selected as the default printer.
Cannot access port (in use by another application)
A device conflict exists. This might occur if another device is installed on your computer and is
running status software. The status software dominates the parallel port on the computer and
denies the device access to the port.
Try the following remedies:
● Disable all of the status windows for other devices.
● Make sure that the device port setting is correct. Change the port settings on the Details
tab or the Ports tab in the device properties.
● Make sure that bidirectional support is disabled for the device. On the Details tab or the
Ports tab in the device properties, make sure that the bidirectional support option is not
selected.
ENWW Onscreen error messages appear 95