My computer (Hp Pavilion 7955) was having hard drive problems, and completly died on me. I went and bought a new hard drive from fry's and installed it (200gb Maxtor). It powered on the first time I pressed the power button, then when I tried later to install Windows XP, it wouldn't power on. So, I went back to fry's and bought a power supply, installed it, loaded windows xp, and everything was fine..... Now its 3 weeks later and my computer won't turn on...Should I try another power supply? Any suggestions/help is greatly appreciated! Thanks!