damaged pcb

Are those two mosfets still good even if they're burnt transparent? Is that ceramic fuse or is it a chemical directory like diodes and mosfets? I'm in school for electronics but I don't have a multimeter yet to indicate it myself. Can someone please help me identify the three damaged components...

Hello, I was unmounting a pair of headphones (JBL TUNE 760NC), and when removing an ear up, I pushed too much on my knife and I think I made a dent in the PCB, as you can see on the photograph. I would like to know if this will prevent my device from working again, and if so, how to repair it...