Hi, I currently have a genuine 64bit version of Windows 7, with an Intel Q9550, ATI XFX 4890 graphics card, 4gb RAM. The PC is connected to my BenQ monitor with a DVI output. Earlier today i accidentally put my computer into sleep mode, my brother not knowing it was on sleep mode, turned the PC on/off from the mains and noticed it was not booting fully. The computer powers on, there is no "beep" and i get a message on the monitor saying no signal detected . The mouse and keyboard are not working during boot up. I have tried resetting and shutting down, but the problem remains. I hope i don't have to format as i have not backed up the data for some time. Thank You.