In the situation of :
If you try to downgrade the P-10 pr firmware to a previous version, it will freeze and stop functioning.
To solve the issue, please do the below:
1. Copy and paste the below URL to your web browser's address bar and hit enter.
Download the current version of firmware(P-10.BIN) Columbus website.
2. In the power-off state, connect P-10 Pro with PC via the data cable. Make sure there are no files under the root directory of the MicroSD card. Copy the firmware file”P-10.BIN” to the root directory of the MicroSD card. Disconnect the P-10 Pro with the PC.
3. Press and hold the three buttons(power+POI+function buttons) at the same time , meanwhile, short press the reset button.
4. Release the three buttons until hearing short beeps, it starts updating firmware and is back to normal.
Remark: The above “4 buttons reset” only for the situation when the P-10 Pro is freeze. If updating the firmware for a working condition P-10 Pro, please follow the instructions on the manufacturer's website. http://cbgps.com/p10/firmware/index_en.html