Hi ltt fourms
So I have this problem with my laptop (z51-70), its gpu was burnt about 14 months ago so since then I was reliant on the intel hd 5500
2 days ago the fan cracked up as high as it can get (which I never seen befor even when playing batman arkham knight befor the gpu burnt) and as noisy it can be, I was playing league of legends, not a demanding game at all when suddenly the fps went form 60-70 to below 5 and stayed there, when I looked at the task manger, the cpu utilization dose not exceed 30% and clock speed is lockes at 0.48ghz, dose not go up or down by anymean, this only happens when I stress the cpu by any mean either by playing league or running cinabench (got 97 btw yay), browsing, installing progrmas and other stuff makes cpu works normally with clock speed ranges from 2.5 to 2.6 which is the normal with the fan speed dose not go down eaither its sound, it is always max since this problem first appeared.
I tried everthing I could find online, tried to update windows but it crashed mid update and rolled back, tried everything I could and no I can not afford a new machine, funny enough this is my brothers laptop not even mine so I was hoping to find a fix without formatting the disk.
Thanks in advance.