I'm using an HP Pavilion Elite m9150f, running XP Black.
I recently disconnected all cables from the tower to move around my computer desk, and when I reattached everything and turned it on, it went through all the BIOS text, showed the Windows loading logo, and instantly went to "No Input Signal."
However, in safe mode, everything works fine. I can navigate through everything in safe mode.
What should I do in safe mode to enable it to run normally?
If you have a dedicated graphics card ensure that your monitor is hooked up to that; not the integrated graphics on the motherboard. If that doesn't work I would try booting into safe mode and re-installing the drivers for your graphics card.