When I turn on my PC the old white splash screen comes up instead of the black, after a minute the screen becomes black. Only when I shut down and turn on again the black splash screen comes up (pushing the reset button put me back to hanged post), then it restarts and windows is started. I tried a lot of things that I found in different forums but nothing worked (I removed the CMOS battery and put it back again but same results). How can I fix it?
unplug everything but the bare minimum, one ram stick, all drives except the OS, all USB devices... If it boots fine turn it off and plug one thing in at a time, repeat until you run into the problem again.
I tried what you said and it didn't solve the problem. But now I have a bigger problem - the PC doesn't turn on. Only when I unplug the 24-pin cable and plug it in again it works, along side the issue I described before.
Have you tried replacing the battery with a new one. Also try clearing cmos with the jumper pins and just use one stick of ram in the first ram slot.
Take out the video card and use the onboard graphics, see if that helps. It could be an issue during the video card initialisation.