fps frop

My laptop is HP Pavilion - 15-cc502ne I bought it in 2017. After a year and a half, my 2 TB harddisk burned, which I understood something was wrong with it but didn't know much what happened. Then after a few weeks battery was swollen too I told maybe because I used that semi burned harddisk...

when playing video games or running other demanding software the power supply on my laptop keeps disconnecting and reconnecting which causes the the GPU and CPU to keep switching from full power to normal , the power supply is 19.5v 4.7A while the laptop demand is 19.5v 7.7A, can this be...