I've had quite a bit of issues with my PC. It has led me to a point where i have now bought a new motherboard and a new PSU (a proper one, nothing cheap). I can't however get it to boot properly. What happens is it lights up, fans spin up - my GFX-card, HD4800 lights up.. then nothing more. The GFX-card keeps lighting all four LED indicators - which implies it is simply getting power, but not any more signals.. I think. The strange thing is that once in this mode, I can't switch it off properly. Using the off button does nothing, nor does the restart - the PW and RESET connector is correctly connected. Also, if I force it off by using the power switch on the PSU.. and turn it on again after a second or two, before it has fully wound down, it will instantly be on and in the same mode again, without having to turn it on. Is this perhaps, a sign of something wrong? I have tried removing memory sticks, trying them one at a time. I've tried it without the GFX-card, and I've tried it with a different CPU. No win. Indeed, after all the work and money I've spent, I've all but given up. This is something of a last resort. The mobo and PSU is brand new, it's not the CPU, nor is it likely the memory. The GFX shouldn't be defective, and in any case it shouldn't stop my computer from starting without any beep or message on-screen. Any ideas?