Power supply problems
The lights on the control panel do not go on.
Cause What to do
The power cord may be unplugged. Check that the power cord is properly plugged into the electrical
outlet.
The outlet may not be operating. If the electrical outlet is controlled by an outside switch or
automatic timer, use a different outlet. Plug another electrical
device, such as a lamp, into the outlet to determine whether the
outlet is operating properly.
The lights come on briefly and then go off. The lights stay off even when the power is turned on again.
Cause What to do
The printer's voltage rating does not match the
voltage of your electrical outlet.
Check the printer and the outlet voltage ratings. If the voltages do
not match, unplug the printer immediately and contact your
dealer.
Warning:
Do not reconnect the power cord to an electrical outlet with the
wrong voltage for your printer.
The printer does not work and the control panel lights are off.
Cause What to do
The printer is turned off. Turn on the printer.
The power cord is not properly plugged into the
electrical outlet; or if your power cord is not
permanently attached to your printer, the power
cord is not properly plugged into the printer.
Turn off the printer and make sure the power cord is firmly
plugged into the electrical outlet and the printer. Then turn on the
power switch.
The electrical outlet does not work. Use a different outlet.
Printing
Printing or printout quality problems
The printer is on but it doesn’t print.
Cause What to do
The interface cable is broken or twisted. Check that the interface cable is not broken or twisted. If you have
another interface cable, replace the cable and check whether the
printer works correctly.
LQ-590II/LQ-590IIN/LQ-2090II/LQ-2090IIN User’s Guide
Troubleshooting 105
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