HP LaserJet Pro 400 MFP M425 - Manual (Page 216)

When connected with a USB cable, the product does not appear in the Print & Fax or
Print & Scan list after the driver is selected.
Software troubleshooting
1. Make sure that your Mac operating system is Mac OS X 10.5 or later.
2. Use the + button to add the product to the Print & Fax (Print & Scan in Mac OS X v10.7) list.
Hardware troubleshooting
1. Make sure that the product is turned on.
2. Make sure that the USB cable is connected correctly.
3. Make sure that you are using the appropriate Hi-Speed USB cable.
4. Make sure that you do not have too many USB devices drawing power from the chain. Disconnect all of
the devices from the chain, and then connect the cable directly to the USB port on the computer.
5. Check to see if more than two non-powered USB hubs are connected in a row on the chain. Disconnect
all of the devices from the chain, and then connect the cable directly to the USB port on the computer.
NOTE: The iMac keyboard is a non-powered USB hub.
You are using a generic print driver when using a USB connection
If you connected the USB cable before you installed the software, you might be using a generic print driver
instead of the driver for this product.
1. Delete the generic print driver.
2. Reinstall the software from the product CD. Do not connect the USB cable until the software installation
program prompts you.
3. If multiple printers are installed, make sure that you have selected the correct printer in the Format For
drop-down menu in the Print dialog box.
200 Chapter 8 Solve problems ENWW