just completed the build i did as instructed to put mains power on for a few seconds and then switched power supply off switched on r2 main switch and then pressed the power button on front got nothing at all
i checked the wires all seem to be seated correctly
still nothing so i tried putting to power adapter back in and then switched r2 main switch on and front power button R2 started turning his head right then left flashed purple and beeped after the beep it started flashing red doing nothing else
the only way i get anything working on r2 is with power adapter pluged in
nother when just battery bank on

i have checked the batterys there all charged up and all have contact with the terminals

i rechecked the terminals they were fine the battery are unprotected.
i did find the fault i stripped down the battery box and found a bad solder on one of the main wires i resoldered the bad solder now it works fine