amp problems rca's maybe?

have a ma audio hk-4000d powering a 18" fi loaded BTL previously had it in an s-10 worked perfect took it out cuz i sold truck kept in my house for about 3 weeks put in my other truck hooked it up the same way and nothing!

power is good

ground is good

remote turn-on is good

tried 4 different kinds of rca's on my current head-unit which previously had subs hooked to it and they worked fine

tried a whole different head unit nothing

could it be burnt or bad rca terminals on the amp? or what

any help is greatly appreciated!!! thanks