please help!!! no effects in main out but in headphone i can hear the effects

kabute132

Hi. i got a question, last time my soundcraft signature 12 mtk is working fine, but suddenly when i use it, my effects don't come out in my speaker. but i hear it when im using headphones. i dont know what the problem is. but i think its hardware issue. but im not using it often, sorry for my bad english,