280 Troubleshooting
Printout is garbled
Graphics do not print correctly
Cause What to do
The interface cable may not be 
plugged in securely.
Make  su re  that  bot h ends o f t he interface  
cable are plugged in securely.
You may not be using the 
correct interface cable.
If you are using the parallel interface, 
make sure that the cable is a 
double-shielded, twisted-pair interface 
cable no more than six feet in length.
If you are using the USB interface, use a 
Revision 2.0 cable.
The emulation setting for the 
port may not be correct.
Specify the emulation mode by using the 
printer’s control panel menus. See 
“Emulation Menu” on page 347.
Note:
If a status sheet does not print correctly, your printer may be damaged. Contact 
your dealer or a qualified service representative.
Cause What to do
The printer emulation setting 
in your application may be 
incorrect.
Make sure that your application is set for 
the printer emulation you are using. For 
example, if you are using the LJ4 
emulation mode, make sure that your 
application is set to use a LaserJet 4 
printer.
You may need more memory. Graphics require large amounts of 
memory. Install an appropriate memory 
module. See “Memory Module” on page 
213.