Class D Amp

So I'm using this dixon 4 channel amp quiet some time now in my daily sound with diy 12v power supply. Today I just put new power on/off switch connected +12v to remote. The amp stays on even remote is switched off via the power switch.

Seems the amp is faulty and I checked with multimeter there is no shot between +12v to rem or to the ground. Anyone knows what to check further. those tiny caps seems fine and no shot detected.