Since you say you just moved
That person said
I have this exact problem every time I move because when I put the computer back together, I always accidentally plug the monitor into the wrong place. My CPU has a spot at the top and a spot at the video card towards the bottom. The top one causes that problem; the bottom works perfectly. If you're sure yours is in the right place, you may have a problem with the video card, but I'd double check if I were you.
Are there 2 connectors that your monitor cable might fit?
Try your monitor on another system?
I have a Dell dimension 3000 with Windows XP.I have recently moved. When I started the computer the power light was blinking amber and the monitor was black. On pressing the switches on the flat panel shows" Power save mode. Move mouse or press any key"
I have tried powering it on,opoening the system and readjusting the power cables and the PCI card with no luck!! When i power it on the fan seems to be working and the motherboard has a green light.
Please advise if there is a problem with the motherboard?
Any advice is appreciated.