I have a Dell Dimension 4600 desktop. I was unable to install Microsoft Office updates or to repair the install, so last night I uninstalled all Office programs. I shut the computer off for the night, planning to commence reinstalling everything from scratch this morning. When I attempt to turn on the computer absolutely nothing happens. No lights light up. The fan doesn't start. Nothing. I unattached everything, including monitors, external harddrives, ethernet, phone cord, keyboard, mouse, apc, etc. I moved the unit into the kitchen and tried plugging it into a different outlet. I tried a different power cable. Still nothing. Any thoughts on how I might get my computer back to life?