Hey guys, So my 2008 8 core Macpro is acting up again. This time is the power supply making chirping sounds and I know for SURE it's from the power supply because I removed all the harddrives and even the graphics card and it's coming from there. I cleaned air dusted the PSU and vacumed it out after taking out the part but it still chirps. It's not the fan either. Some component inside the PSU is making the noise. Do I need to get a new power supply? if so, where could I get one and can I replace it myself without blowing up the computer? Thanks for the help!