Why do I hear 5 short beeps (instead of 1 long beep) at the end of configuring P-10 Pro?

"5 shorts beeps" indicates the file format error. The reason could be the "CONFIG.TXT" file you used to config P-10 has the wrong format. 

This issue usually is because it is missing the 2 last characters, a CR and LF at  the end of the  CONFIG.TXT. Adding an "enter" at the end of the file will fix the issue. Please refer to the below screenshot.