USB service check

Step 1

Is the USB cable properly connected to the printer and host PC?

Go to step 2.

Properly connect the cable at both ends.

Step 2

Try a different USB cable.

Does this fix the issue?

Issue fixed.

Go to step 3.

Step 3

Connect a different device to the USB cable.

Did the host PC see the device?

Replace the controller board. See Controller board removal.

There is an issue with the host machine.