so this started yesterday when my pc started making weird buzzing noise it was preatty dusty inside so i cleaned it and it stopped for around 5 hours then it started again this never happened before even the pc is kinda old note that i was not able to identify main source the sound is coming from its like all over the case or something also when i tried moving pc closer to me(or just moving) to check whats going on to watch the fans it did not turn on until i moved it back where it was it sounds weird but i am providing all the information