Hey everyone, im dwaltin, new to this site but i need some help BADLY! Heres my problem: Last monday or tuesday i came home and my computer (custom built w/ no problems for over a year) was not on (which it was when i left) and it was making a really high pitched ringing noise (almost like when your ears are ringing), i tried to turn the computer on but nothing, nor was the mobo led lit up, i found that the ringing was coming from the power supply so i turn it off from the back and pull the plug and it stopped. After trying it again and still no change i pulled the power supply out and it had a burning smell coming from it. so i ordered a new power supply which was a little bit better, aspire 520w. it doesnt work however it does make the mobo led come on. after unplugging everything and plugging them back in it turned on, i then hooked up the mouse keyboard and monitor but none of them would work, i reboot to try to fix this problem and now it wont boot at all. Then the new power supply starts to ring like the other one so i unplug it (it did not smell like something had burned tho) and it stops, however now when i plug it back in it does not light up the mobo led. i reset the bois by removing the battery for 30mins and still no change. Then i try my new power supply in my old computer (which still works) and it did not work so i believe the new power supply is dead too. What should i do or replace?!?!