An offline error on the Panasonic printer means that the printer is no longer connected to the network. This error stops the printer from printing and shows a "printer offline" error on its display. You will experience this error when your network connection is faulty. Moreover, it can be due to incorrect settings on your computer. But if you follow these steps, you can easily resolve the printer offline error. 

Basic Troubleshooting 

These are some basic troubleshooting methods that should be performed primarily to fix an offline Panasonic printer. 

Step 1: Check the Printer and Computer Connection

1. Check if the printer is well-connected to cables and wires. 
2. Ensure that the power cable or USB cables are not loose or broken. 
3. If the cables are broken, replace them with new ones. 

Step 2: Restart the Printer and Computer

If everything is okay, you can restart your printer and computer to resolve the printer offline issue. Follow these steps to restart your devices: 

Computer: 

1. In the first step, click the Windows Start icon on the computer's taskbar. 
2. Then, click the power button and select the Restart option. 

Printer: 

1. First of all, press and hold the power button at the front of your printer. 
2. Then, remove the power cable of your printer from the power outlet on the wall. 
3. Now, wait for a minute and again connect the printer's power cable to the wall outlet. 
4. After that, press and hold the power button to turn the printer on.  

Then, allow your computer to restart. 

Step 3: Check if the Printer and Computer Are Connected to the Same Network

If your devices are not connected to the same network, it can make your Panasonic printer go offline. To check it, follow the steps given below: 

1. On your computer, go to the bottom right corner and select the WiFi option. 
2. Then, check the name of your wireless network. 
3. On your Panasonic printer, use the arrow keys to go to the Settings option from the menu. 
4. Now, locate the Network Settings or Wireless Settings option. 
5. After that, select the Network Status option. 
6. Match the network name with the computer's WiFi connection. 

The network name on both devices should be the same. 

Advanced Troubleshooting Steps

When you have applied the basic steps but nothing happens, you can try the advanced methods. 

Step 1: Set Your Printer as the Default

The printer not being set as the default is one of the big problems for an offline printer. Therefore, you need to set it as a default device. 

1. First of all, click the Start icon on your computer's taskbar. 
2. Then, search for the Control Panel option. Select it and open it. 
3. Now, click the View Devices and Printers link under the Devices and Printers option. 
4. After that, click the Printers & Scanners option. 
5. Next, locate your Panasonic printer and right-click on it. 
6. Now, choose the "set as default printer" option. 

Check if your printer is working fine now. Otherwise, move to the next step.

Step 2: Turn Off the Use Printer Offline Option

This is a computer feature that keeps your printer offline or online. If this feature is ON, your printer will not work properly. Hence, you need to turn this feature off.

1. Go to the Control Panel like in the previous step. 
2. Now, click the Hardware and Sound option. 
3. Then, click the Devices and Printers option. 
4. Choose your printer from the list and right-click on it. 
5. Next, check if the "Use Printer Offline" option is selected. If it is selected, deselect it. 

When you turn off this option, your printer will return to the online mode. Now, you can start printing again. 

A Panasonic printer being offline is a very common issue. It can arise from a range of factors like network connectivity problems, incorrect printer settings, etc. But with the right methods, you can fix it very quickly. To resolve it, restart your printer and computer and check if they are both connected to the same network. Moreover, you can correct the printer settings, such as by setting the printer as a default printer and turning off the "Use Printer Offline" option.