Hum in amplifier after replacement

[ManUtd]

Hi every one!
I have a subwoofer Class D plateamplifier in a Audio Physics Rhea 2. Original amp is dead and i have replaced it with one Similar but not excatly same. Ut Works fine, except for it making some hum at speaker output. Could this be cause by the blue components in picture? The original amp do not have them and was complete ly quiet. Could i Just remove them for a try out?

 

[ManUtd]

Solution for thisone was quite easy.
I putted different resistors accross input to gnd starting from 100k.Ending up with a 10k resistors giving me No hum and Good gain.