My computer (HP Pavilion a450n) will not turn on. The monitor will momentarily display the following message, (Warning PC Entering Power Saving Mode) but otherwise is blank. I have attempted to unplug and replug every which way in different outlets, but it is useless. My computer simply will not turn on. It ran fine until I unplugged it to move it, since then I cannot get it to turn back on. Please help!

My computer (HP Pavilion a450n) will not turn on. The monitor will momentarily display the following message, (Warning PC Entering Power Saving Mode) but otherwise is blank. I have attempted to unplug and replug every which way in different outlets, but it is useless. My computer simply will not turn on. It ran fine until I unplugged it to move it, since then I cannot get it to turn back on. Please help!
Double check that the outlet you are plugging into actually has power. It may be a switched outlet or one that has a GFI that has tripped. (Ask me how I know about this! )
Make certain that the entire PC is hooked together before you plug into the wall outlet. Then you should hit the power button, firmly but briefly.
If you're not getting the PC to power up, have the outlet tested and/or take the PC to have the power supply tested. (I had one that would simply power off whenever it wanted to - the power supply was faulty)
I hope this helps.