the day before my pc stopped working the fan had noticeably slowed down but i thought nothing of it but the next day it had slowed tremendously so i shut off the pc completely. the next day i slid the fan panel off, still plugged in running slowly, a few moments after the entire pc had just shut off, at first i thought it was the mother board so i took it apart to find out it wasn't because the light on it was still on, but i also dont think its the power supply because the front light of the tower brand words are still on but none of the keyboard, mouse or headphone lights are on, the tower and most parts are about 5 years old with a few new parts, what is a way i could fix it or should i just get a new pc