Offline Printer is "offline" and get Connection error in status monitor. I do not have a spare USB cable, but have no reason to think it is bad.I reinstalled the driver to no avail. I also went thru the setup procedure.

Best Solutions to Troubleshoot Samsung Printer Offline Error
Solution 1: Check Your Samsung Printer Connection
Solution 2: Check Printing Status
Solution 3: Restart the Printer Spooler Service
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The most likely cause for this OFFLINE status on the PC is which interface is selected on the printer.
I think the printer defaults to Serial interface, so if you are using USB ensure you select the USB interface via the control panel on the printer, similarly if the connection is parallel ensure the parallel interface is selected.
If the connection is serial, ensure the cable is of the correct pin configuration and ensure the serial interface is set up correctly.

I'm assuming the printer worked previously from the iMac and now it does not. If you never had it connected, please add a comment to this effect, and include your OS version.

First, Open the Print Center (Printer Utility) and check the status of the printer. It may be listed as stopped. If so, delete any extra print jobs (additional attempts to print the page), then click the Start Jobs icon.

You can verify printer connectivity by clicking Add in the Printer List (if that is not visible, select Show Printer List from the View menu). Be sure to select either the USB or wireless network protocol connection. If the NX420 shows up, you have a good connection. In that case, click cancel and skip the next paragraph.

If you are printing via USB, check the cable (I sometimes forget to plug in my printer cable after downloading from my camera). If you are printing via your wireless network, check the status of the wireless connection from the printer.

Also, in the printer utility window, click the Supply Levels icon to verify that all of the ink cartridge levels are high enough to permit printing.

Are there any error messages on the printer display? A fault detection will take the printer offline.

On Printer and faxes, right click on your printer and unselect "Use printer Offline". If "Use printer Offline" is not select, then verify you USB cable.

If I could be of further assistance, let me know. If thishelps or solves the issue, please rate it and give a testimonialfor my response.

The first thing I would check is the cable. If you're using a USB connection, try a different (and known to be good) USB cable. If that doesn't do it, you may have a damaged USB connection socket at the printer, which is not cost effective to repair.

Hope that's helpful.

When you double click the Printer and Faxes icon in the Control Panel you will see the printer that your computer is currently using. See.... if the printer image is clear it is online and ready to use, if its blurred then its in offline mode and cannot be use.

To correct offline printer.. some possible reasons is on the usb cable.. check if there is no open wire along the cable...Inserting the USB connector on the other usb slot of the cpu sometimes work just wait first until it is read.

If the printer is still blurred and offline after checking the usb connection, the 2nd thing to do is check the properties of the printer if it is set to offline mode. how? Double click your printer icon. It will display the print jobs window. Click on the Printer tab and uncheck on the "Use printer Offline". Cancel all pending print jobs, close the printer window and try again to print.

When you double click the Printer and Faxes icon in the Control Panel you will see the printer that your computer is currently using. See.... if the printer image is clear it is online and ready to use, if its blurred then its in offline mode and cannot be use.

To correct offline printer.. some possible reasons is on the usb cable.. check if there is no open wire along the cable...Inserting the USB connector on the other usb slot of the cpu sometimes work just wait first until it is read.

If the printer is still blurred and offline after checking the usb connection, the 2nd thing to do is check the properties of the printer if it is set to offline mode. how? Double click your printer icon. It will display the print jobs window. Click on the Printer tab and uncheck on the "Use printer Offline". Cancel all pending print jobs, close the printer window and try again to print.

When you double click the Printer and Faxes icon in the Control Panel you will see the printer that your computer is currently using. See.... if the printer image is clear it is online and ready to use, if its blurred then its in offline mode and cannot be use.

To correct offline printer.. some possible reasons is on the usb cable.. check if there is no open wire along the cable...Inserting the USB connector on the other usb slot of the cpu sometimes work just wait first until it is read.

If the printer is still blurred and offline after checking the usb connection, the 2nd thing to do is check the properties of the printer if it is set to offline mode. how? Double click your printer icon. It will display the print jobs window. Click on the Printer tab and uncheck on the "Use printer Offline". Cancel all pending print jobs, close the printer window and try again to print.

Is it giving any errors when you try to print?

Do you mean it says "offline" under the printer icon in your PC's printer dialog box?
Right click it , then select "use printer online".

Please let me know