HP Color LaserJet Pro M255dw Offline: What to Check

Start with the connection your M255dw actually uses

The M255dw can print over USB, Ethernet or Wi-Fi. An “offline” message therefore does not point to one universal cause. First identify how this printer is connected, then test that path before changing drivers or removing the printer.

If you use Wi-Fi

Use the printer’s built-in network diagnostics first. The M255dw can produce a Network Summary and run a Wireless Network Test from its touchscreen. These checks help establish whether the printer itself is still connected to the wireless network.

If the wireless test fails or the network information is not what you expect, troubleshoot the printer-to-router connection. If those checks look normal but only one computer reports the printer offline, the problem is more likely on that computer, its print queue, or its installed printer configuration.

If you use Ethernet

The M255dw has Fast Ethernet. Check the physical network connection and whether the printer remains reachable on the network before reinstalling the driver. A printer that has lost network connectivity will not be fixed simply by repeatedly adding another Windows printer entry.

If you use USB

Check the direct USB connection and whether the operating system still detects the M255dw. If the connection is intact but jobs remain stuck, clear the print queue and then use HP’s current diagnostic guidance or reinstall the correct HP software if necessary.

When reinstalling software makes sense

Reinstallation becomes more reasonable after the connection itself has been verified. HP maintains a dedicated M255dw software-and-driver page; use the current package for your operating system rather than downloading a driver from an unofficial source.