Yes I did find a solution to this problem. After swapping half the parts on the 24v side of the power supply, and it was still chirping and squeeling, I gutted it. I installed a meanwell 350 watt 24v power supply and tied it into the 24v side. I left the 12v section alone.I hate to bump an old thread but I was just wondering if anyone was ever to find a solution to this problem. I'm having the same "chirp" issue. I'm an electronics novice. I can test some components with a meter and solder but that about it. I ordered a "repair kit" for the board off ebay it came with replacement caps for C953 C952 C951 and C955. It also had 2 replacement diodes for ZD902 and ZD904. I replaced all the components but i still have the chirp and no picture.