Cyma Cm121 AEP Help please?

Hello i got a Cyma Cm .121 Desert Eagle AEP 2 months ago or so and today when i tried to use it its not working. i pull the trigger and nothing happens the battery is connected and charged \ but i dint hear anything. the visible parts all move like they're sopost to but it doesn't make a noise or fire any bbs. i think it might be an electrical problem but im not sure. and im not sure how to open it up and get to the fuse to check it. if anyone can please help me out that would be awesome i dont want to have to buy a new one or send it in for repairs