P10 error means paper issue generally, paper jam, no paper feeding etc. none of them happened this time, just electronically wrong, here is the solution:
1. turn off the printer
2. press & hold the stop button
3. turn on the printer but hold the power button
4. while holding the power button, release the stop button
5. then still hold the power button, press "stop" twice
6. release power button
7. the P10 code supposed to be gone, or turn off the printer and turn back on again
1. turn off the printer
2. press & hold the stop button
3. turn on the printer but hold the power button
4. while holding the power button, release the stop button
5. then still hold the power button, press "stop" twice
6. release power button
7. the P10 code supposed to be gone, or turn off the printer and turn back on again