Based on your tests, I wonder, does the system beep if you try booting it up without memory? If it does, we could begin the diagnosis/troubleshooting by suggesting to have the system assembled with the bacic components, only.
* Please, ensure you wear an anti-ESD bracelet on an anti-ESD surface (click here).
* A basic computer configuration would consist of the following: keyboard, mouse, processor, memory (see the note below), hard drive, DVD-ROM, video card, and monitor. No other add-in should be installed.
If you do get beeps when trying booting the system up without memory, it means the following can still be tried out:
1. Clear the CMOS as outlined here:
2. Perform BIOS Recovery using the most current .bio file (click here).
Note: The step-by-step instructions are found here: