Recently, I bought a new computer desk. I had to disconnect my PC tower to put in the desk. After hooking everything back up, I started to have major issues with the computer. (I mention this because its the only thing that has changed) Now, when the power button is pressed, the computer will begin to boot up and then, after 4-5 seconds, will shut down again. It will not come on completely. I did speak with Dell when I could get the PC to at least come on for a minute. They had me run various diagnostics and they all came back with NO ERRORS. This is so odd. I feel like its either a bad power supply or faulty power switch. Any suggestions or help? Thanks so much.