I opened it up and added an additional 512MB of RAM, added another separate 320GB HD and replaced both CD/DVD/RW drives. The machine booted up OK before doing these basic mods. I have double checked and tripled checked that all pin connectors, wires and miscellaneous cords are fastened tightly and in the appropriate ports.
Now the machine won't power on at all. Before doing these mods, I could boot into the OS no problem. The power supply led light illuminates once I plug into the wall outlet. However as soon as I press the PC's start up button, the power supply light quickly goes out and I hear no fan noises or anything indicating the box is getting power.
I really doubt the power supply died because it was working fine before the hardware mods. Maybe something happened inadvertently to short out? Do power supplies need time to charge after unplugging connectors for a brief time? I've ruled out some basic things, and I'm relatively tech savvy.. are there any solutions besides changing the power supply?
Thank you for your time and solutions!
Edited by iPowerUser, 14 November 2009 - 05:01 PM.