I opened a 27 mhz controller up and it will no longer go into a charge mode. I checked for dirt, bent/ broken wires nothing. It was a perfectly working controller before i opened it. So i opend a 49mhz controller to see if anyhting was diffrent and to see how the wiring was. I swear if i fix this i am never opening another controller because now the 49 mhz controller will not work but will charge and the 27 mgz controller still will not go into a charge mode. So i have two cars not working. Can someone please tell me what i'm doing wrong?