gonna need more info. is the decoupler head still intact? you'll be able to tell if you start it up and listen for the low-resonance reducter (sounds kinda like a rat chewing on a spoon). if you dont it's a good sign that you got a cracked decoupler and need to replace the whole thermal transfer assembly which you may as well just get a new machine at that point. of course if you do hear it and it sounds normal, it could simply be a problem with one of the transducer diodes and to fix that you'd just need to short the main frequency output controller with like a wet sponge or something