Due to unknown reason, in rare cases, the CPU could be lockup into a "Safe Mode", which result in a situation that the printer will able to be detected by computer but unable to respond to any commands eg. initialization. Here we provide a CPU Utility program to reset the CPU back to normal.
1. Connect printer to computer with USB and switch on power.
2. Open the CPU Utility program without opening the printing software.
3. Click the "Get system info" button and see if you get something like "Safe Mode".
4. Click "Reset Functions" see if you can initialize again.
If the CPU cannot be rescued by the method described above, then it could be due to other problems like physical damage by static charge and etc, which CPU may need to be replaced.