To put an HP printer online, follow these steps:

### **1. Check Printer Connection**
– **USB Connection**: Ensure the printer is properly connected to your computer via a USB cable. Check that both ends of the cable are secure.
– **Wireless Connection**: Verify that the printer is connected to the same Wi-Fi network as your computer. Use the Wi-Fi Protected Setup (WPS) if necessary[1][2].

### **2. Restart Devices**
– **Full Restart**: Turn off the printer, unplug it, and restart your computer and router. Plug the printer back in and turn it on. This can resolve connectivity issues[2].

### **3. Run HP Print and Scan Doctor**
– Download and run the **HP Print and Scan Doctor** tool. This application can diagnose and fix issues with your printer, including connectivity problems[1].

### **4. Check and Set Default Printer**
– **For Windows**:
1. Open **Devices and Printers** via the Control Panel.
2. Right-click on your HP printer.
3. Select **Set as Default Printer**. Also, ensure that **Use Printer Offline** is unchecked[2][3].
– **For Windows Settings**:
1. Go to **Settings** > **Devices** > **Printers & Scanners**.
2. Click on your printer and select **Open Queue**.
3. Uncheck **Use Printer Offline** if it’s enabled[3].

### **5. Check Printer Status**
– Open **Devices and Printers**.
– Right-click on your HP printer and select **See what’s printing**.
– Cancel any pending or stuck print jobs[2].

### **6. Update Drivers and Firmware**
– Ensure your printer drivers and firmware are up-to-date. Outdated drivers can cause connectivity issues[3].

If these steps do not resolve the issue, consider contacting HP support for further assistance.