My Hewlet packard 8750 model with windows xp froze on me the other day and now won't boot any furher than power tothe fan and the hard drives spinning. I've uninstalled the cmos batery no luck, flipped the jumpers no luck. I get 2 beeps now but it just stalls after the power light and processsing light come on then the processing light goes out. It just froze on me originally so I hit the power button on the power box. I turned it back on using the power button onthe pc but it still wont boot up like it never shut down. switched ram cards uninstalled video cables.